diff --git a/CHANGELOG.md b/CHANGELOG.md
index b6563cdc1..c571fdae7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,20 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+### Fixed
+
+- Fixed the account aggregations in impersonation mode to be based on the impersonated user
+- Fixed the base currency of the activities in impersonation mode to be based on the impersonated user
+- Fixed the base currency of the dividends in impersonation mode to be based on the impersonated user
+- Fixed the base currency of the user account settings in impersonation mode to be disabled
+- Fixed the benchmark selector of the performance chart on the analysis page in impersonation mode to be disabled
+- Fixed the emergency fund of the _X-ray_ page in impersonation mode to be based on the impersonated user
+- Fixed the savings rate of the _FIRE_ calculator in impersonation mode to be presented
+- Fixed the user settings in impersonation mode to be based on the impersonated user
+- Fixed the validation of the impersonation identifier of an unknown user
+
 ## 3.47.0 - 2026-08-10
 
 ### Changed
diff --git a/apps/api/src/app/activities/activities.controller.ts b/apps/api/src/app/activities/activities.controller.ts
index 72056737c..63357e6b4 100644
--- a/apps/api/src/app/activities/activities.controller.ts
+++ b/apps/api/src/app/activities/activities.controller.ts
@@ -7,16 +7,19 @@ import { TransformDataSourceInResponseInterceptor } from '@ghostfolio/api/interc
 import { ApiService } from '@ghostfolio/api/services/api/api.service';
 import { DataProviderService } from '@ghostfolio/api/services/data-provider/data-provider.service';
 import { ImpersonationService } from '@ghostfolio/api/services/impersonation/impersonation.service';
+import { PrismaService } from '@ghostfolio/api/services/prisma/prisma.service';
 import { DataGatheringService } from '@ghostfolio/api/services/queues/data-gathering/data-gathering.service';
 import { getIntervalFromDateRange } from '@ghostfolio/common/calculation-helper';
 import {
   DATA_GATHERING_QUEUE_PRIORITY_HIGH,
+  DEFAULT_CURRENCY,
   HEADER_KEY_IMPERSONATION
 } from '@ghostfolio/common/config';
 import { CreateOrderDto, UpdateOrderDto } from '@ghostfolio/common/dtos';
 import {
   ActivitiesResponse,
-  ActivityResponse
+  ActivityResponse,
+  UserSettings
 } from '@ghostfolio/common/interfaces';
 import { permissions } from '@ghostfolio/common/permissions';
 import type { RequestWithUser } from '@ghostfolio/common/types';
@@ -54,6 +57,7 @@ export class ActivitiesController {
     private readonly dataProviderService: DataProviderService,
     private readonly dataGatheringService: DataGatheringService,
     private readonly impersonationService: ImpersonationService,
+    private readonly prismaService: PrismaService,
     @Inject(REQUEST) private readonly request: RequestWithUser
   ) {}
 
@@ -169,8 +173,9 @@ export class ActivitiesController {
 
     const impersonationUserId =
       await this.impersonationService.validateImpersonationId(impersonationId);
+    const userId = impersonationUserId || this.request.user.id;
 
-    const userCurrency = this.request.user.settings.settings.baseCurrency;
+    const userCurrency = await this.getUserCurrency(impersonationUserId);
 
     const { activities, count } = await this.activitiesService.getActivities({
       endDate,
@@ -181,9 +186,9 @@ export class ActivitiesController {
       startDate,
       take,
       userCurrency,
+      userId,
       includeDrafts: true,
       types: activityTypes,
-      userId: impersonationUserId || this.request.user.id,
       withExcludedAccountsAndActivities: true
     });
 
@@ -200,12 +205,14 @@ export class ActivitiesController {
   ): Promise<ActivityResponse> {
     const impersonationUserId =
       await this.impersonationService.validateImpersonationId(impersonationId);
-    const userCurrency = this.request.user.settings.settings.baseCurrency;
+    const userId = impersonationUserId || this.request.user.id;
+
+    const userCurrency = await this.getUserCurrency(impersonationUserId);
 
     const { activities } = await this.activitiesService.getActivities({
       userCurrency,
+      userId,
       includeDrafts: true,
-      userId: impersonationUserId || this.request.user.id,
       withExcludedAccountsAndActivities: true
     });
 
@@ -377,4 +384,18 @@ export class ActivitiesController {
       }
     });
   }
+
+  private async getUserCurrency(impersonationUserId: string) {
+    if (!impersonationUserId) {
+      return this.request.user.settings.settings.baseCurrency;
+    }
+
+    const settings = await this.prismaService.settings.findUnique({
+      where: { userId: impersonationUserId }
+    });
+
+    return (
+      (settings?.settings as UserSettings)?.baseCurrency ?? DEFAULT_CURRENCY
+    );
+  }
 }
diff --git a/apps/api/src/app/endpoints/public/public.controller.ts b/apps/api/src/app/endpoints/public/public.controller.ts
index 67bed71ef..53daf3469 100644
--- a/apps/api/src/app/endpoints/public/public.controller.ts
+++ b/apps/api/src/app/endpoints/public/public.controller.ts
@@ -78,7 +78,7 @@ export class PublicController {
     ] = await Promise.all([
       this.portfolioService.getDetails({
         filters,
-        impersonationId: access.userId,
+        impersonationId: undefined,
         userId: user.id,
         withMarkets: true
       }),
diff --git a/apps/api/src/app/portfolio/portfolio.controller.ts b/apps/api/src/app/portfolio/portfolio.controller.ts
index 953976a4a..3eb9ca4d9 100644
--- a/apps/api/src/app/portfolio/portfolio.controller.ts
+++ b/apps/api/src/app/portfolio/portfolio.controller.ts
@@ -368,7 +368,8 @@ export class PortfolioController {
 
     let dividends = this.portfolioService.getDividends({
       activities,
-      groupBy
+      groupBy,
+      userCurrency
     });
 
     if (
diff --git a/apps/api/src/app/portfolio/portfolio.service.ts b/apps/api/src/app/portfolio/portfolio.service.ts
index 704de93f2..88f675008 100644
--- a/apps/api/src/app/portfolio/portfolio.service.ts
+++ b/apps/api/src/app/portfolio/portfolio.service.ts
@@ -45,7 +45,8 @@ import {
   getSum,
   isAccountExcluded,
   isDraftActivity,
-  parseDate
+  parseDate,
+  resolveUserSettings
 } from '@ghostfolio/common/helper';
 import {
   AccountsResponse,
@@ -195,10 +196,10 @@ export class PortfolioService {
         orderBy: { name: 'asc' }
       }),
       this.getDetails({
+        userId,
         withExcludedAccounts,
         filters: filtersWithoutSearchQueryFilter,
-        impersonationId: userId,
-        userId: this.request.user.id
+        impersonationId: undefined
       }),
       this.userService.user({ id: userId })
     ]);
@@ -355,10 +356,12 @@ export class PortfolioService {
 
   public getDividends({
     activities,
-    groupBy
+    groupBy,
+    userCurrency
   }: {
     activities: Activity[];
     groupBy?: GroupBy;
+    userCurrency: string;
   }): InvestmentItem[] {
     let dividends = activities.map(({ currency, date, value }) => {
       return {
@@ -366,7 +369,7 @@ export class PortfolioService {
         investment: this.exchangeRateDataService.toCurrency(
           value,
           currency,
-          this.getUserCurrency()
+          userCurrency
         )
       };
     });
@@ -1142,7 +1145,16 @@ export class PortfolioService {
     userId: string;
   }): Promise<PortfolioReportResponse> {
     userId = await this.getUserId(impersonationId, userId);
-    const userSettings = this.request.user.settings.settings as UserSettings;
+
+    const user = await this.userService.user({ id: userId });
+
+    // The rules are evaluated against the portfolio of the (potentially
+    // impersonated) user, while the translations follow the language of the
+    // authenticated user
+    const userSettings = resolveUserSettings({
+      impersonationUserSettings: user?.settings?.settings as UserSettings,
+      userSettings: this.request.user.settings.settings as UserSettings
+    });
 
     const { accounts, holdings, markets, marketsAdvanced, summary } =
       await this.getDetails({
@@ -2148,11 +2160,7 @@ export class PortfolioService {
   }
 
   private getUserCurrency(aUser?: UserWithSettings) {
-    return (
-      aUser?.settings?.settings.baseCurrency ??
-      this.request.user?.settings?.settings.baseCurrency ??
-      DEFAULT_CURRENCY
-    );
+    return aUser?.settings?.settings.baseCurrency ?? DEFAULT_CURRENCY;
   }
 
   private async getUserId(aImpersonationId: string, aUserId: string) {
diff --git a/apps/api/src/app/user/user.service.ts b/apps/api/src/app/user/user.service.ts
index a055f029e..ada59f460 100644
--- a/apps/api/src/app/user/user.service.ts
+++ b/apps/api/src/app/user/user.service.ts
@@ -41,6 +41,7 @@ import {
   THROTTLE_DAILY_TTL
 } from '@ghostfolio/common/config';
 import { SubscriptionType } from '@ghostfolio/common/enums';
+import { resolveUserSettings } from '@ghostfolio/common/helper';
 import {
   User as IUser,
   ReferralPartner,
@@ -58,7 +59,7 @@ import { PerformanceCalculationType } from '@ghostfolio/common/types/performance
 import { Injectable, Logger } from '@nestjs/common';
 import { EventEmitter2 } from '@nestjs/event-emitter';
 import { InjectThrottlerStorage, ThrottlerStorage } from '@nestjs/throttler';
-import { Prisma, Role, Settings, User } from '@prisma/client';
+import { Prisma, Role, User } from '@prisma/client';
 import { differenceInDays, subDays } from 'date-fns';
 import { isNil, without } from 'lodash';
 import { createHmac } from 'node:crypto';
@@ -127,7 +128,7 @@ export class UserService {
       accounts,
       activitiesCount,
       firstActivity,
-      impersonationUserSettings,
+      impersonationUser,
       tagsForUser
     ] = await Promise.all([
       this.prismaService.access.findMany({
@@ -156,16 +157,17 @@ export class UserService {
         where: { userId: impersonationUserId || user.id }
       }),
       impersonationUserId
-        ? this.prismaService.settings.findUnique({
-            where: { userId: impersonationUserId }
-          })
-        : Promise.resolve<Settings>(null),
+        ? this.user({ id: impersonationUserId })
+        : Promise.resolve<UserWithSettings>(null),
       this.tagService.getTagsForUser(impersonationUserId || user.id)
     ]);
 
-    const baseCurrency =
-      (impersonationUserSettings?.settings as UserSettings)?.baseCurrency ??
-      (settings.settings as UserSettings)?.baseCurrency;
+    const resolvedUserSettings = resolveUserSettings({
+      impersonationUserSettings: impersonationUserId
+        ? ((impersonationUser?.settings?.settings ?? {}) as UserSettings)
+        : undefined,
+      userSettings: settings.settings as UserSettings
+    });
 
     let referralPartners: ReferralPartner[];
 
@@ -220,9 +222,9 @@ export class UserService {
       }),
       dateOfFirstActivity: firstActivity?.date ?? new Date(),
       settings: {
-        ...(settings.settings as UserSettings),
-        baseCurrency,
-        locale: (settings.settings as UserSettings)?.locale ?? locale
+        ...resolvedUserSettings,
+        baseCurrency: resolvedUserSettings.baseCurrency ?? DEFAULT_CURRENCY,
+        locale: resolvedUserSettings.locale ?? locale
       }
     };
   }
diff --git a/apps/api/src/services/impersonation/impersonation.service.ts b/apps/api/src/services/impersonation/impersonation.service.ts
index 71c543a43..798a20e5c 100644
--- a/apps/api/src/services/impersonation/impersonation.service.ts
+++ b/apps/api/src/services/impersonation/impersonation.service.ts
@@ -12,7 +12,11 @@ export class ImpersonationService {
     @Inject(REQUEST) private readonly request: RequestWithUser
   ) {}
 
-  public async validateImpersonationId(aId = '') {
+  public async validateImpersonationId(aId?: string) {
+    if (!aId) {
+      return null;
+    }
+
     if (this.request.user) {
       const accessObject = await this.prismaService.access.findFirst({
         where: {
@@ -29,7 +33,13 @@ export class ImpersonationService {
           permissions.impersonateAllUsers
         )
       ) {
-        return aId;
+        // The identifier is a user id in this case, hence verify its existence
+        const user = await this.prismaService.user.findUnique({
+          select: { id: true },
+          where: { id: aId }
+        });
+
+        return user?.id ?? null;
       }
     } else {
       // Public access
diff --git a/apps/client/src/app/components/benchmark-comparator/benchmark-comparator.component.html b/apps/client/src/app/components/benchmark-comparator/benchmark-comparator.component.html
index 328cccba1..eceb31df3 100644
--- a/apps/client/src/app/components/benchmark-comparator/benchmark-comparator.component.html
+++ b/apps/client/src/app/components/benchmark-comparator/benchmark-comparator.component.html
@@ -18,7 +18,10 @@
       <mat-label i18n>Compare with...</mat-label>
       <mat-select
         name="benchmark"
-        [disabled]="user()?.subscription?.type === 'Basic'"
+        [disabled]="
+          !hasPermissionToUpdateUserSettings() ||
+          user()?.subscription?.type === 'Basic'
+        "
         [value]="benchmark()?.id"
         (selectionChange)="onChangeBenchmark($event.value)"
       >
diff --git a/apps/client/src/app/components/benchmark-comparator/benchmark-comparator.component.ts b/apps/client/src/app/components/benchmark-comparator/benchmark-comparator.component.ts
index 0091ae5d7..e21f54aaf 100644
--- a/apps/client/src/app/components/benchmark-comparator/benchmark-comparator.component.ts
+++ b/apps/client/src/app/components/benchmark-comparator/benchmark-comparator.component.ts
@@ -69,6 +69,7 @@ export class GfBenchmarkComparatorComponent implements OnChanges, OnDestroy {
   public readonly benchmarkDataItems = input<LineChartItem[]>([]);
   public readonly benchmarks = input<Partial<SymbolProfile>[]>();
   public readonly colorScheme = input.required<ColorScheme>();
+  public readonly hasPermissionToUpdateUserSettings = input<boolean>();
   public readonly isLoading = input<boolean>();
   public readonly locale = input(getLocale());
   public readonly performanceDataItems = input.required<LineChartItem[]>();
diff --git a/apps/client/src/app/components/user-account-settings/user-account-settings.component.ts b/apps/client/src/app/components/user-account-settings/user-account-settings.component.ts
index a4d8a1ba1..83f7ddd9a 100644
--- a/apps/client/src/app/components/user-account-settings/user-account-settings.component.ts
+++ b/apps/client/src/app/components/user-account-settings/user-account-settings.component.ts
@@ -1,3 +1,4 @@
+import { ImpersonationStorageService } from '@ghostfolio/client/services/impersonation-storage.service';
 import {
   KEY_STAY_SIGNED_IN,
   KEY_TOKEN,
@@ -90,6 +91,7 @@ export class GfUserAccountSettingsComponent implements OnInit {
   protected readonly deleteOwnUserForm = inject(NonNullableFormBuilder).group({
     accessToken: ['', Validators.required]
   });
+  protected hasImpersonationId: boolean;
   protected hasPermissionToDeleteOwnUser: boolean;
   protected hasPermissionToRequestOwnUserDeletion: boolean;
   protected hasPermissionToUpdateViewMode: boolean;
@@ -129,6 +131,9 @@ export class GfUserAccountSettingsComponent implements OnInit {
   private readonly dataService = inject(DataService);
   private readonly deviceDetectorService = inject(DeviceDetectorService);
   private readonly destroyRef = inject(DestroyRef);
+  private readonly impersonationStorageService = inject(
+    ImpersonationStorageService
+  );
   private readonly notificationService = inject(NotificationService);
   private readonly settingsStorageService = inject(SettingsStorageService);
   private readonly snackBar = inject(MatSnackBar);
@@ -140,6 +145,17 @@ export class GfUserAccountSettingsComponent implements OnInit {
 
     this.currencies = currencies;
 
+    this.impersonationStorageService
+      .onChangeHasImpersonation()
+      .pipe(takeUntilDestroyed(this.destroyRef))
+      .subscribe((impersonationId) => {
+        this.hasImpersonationId = !!impersonationId;
+
+        this.updateBaseCurrencyFormState();
+
+        this.changeDetectorRef.markForCheck();
+      });
+
     this.userService.stateChanged
       .pipe(takeUntilDestroyed(this.destroyRef))
       .subscribe((state) => {
@@ -192,11 +208,7 @@ export class GfUserAccountSettingsComponent implements OnInit {
             baseCurrency: this.user.settings.baseCurrency ?? null
           });
 
-          if (this.hasPermissionToUpdateUserSettings) {
-            this.baseCurrencyForm.enable({ emitEvent: false });
-          } else {
-            this.baseCurrencyForm.disable({ emitEvent: false });
-          }
+          this.updateBaseCurrencyFormState();
 
           if (this.user.settings.locale) {
             this.locales.push(this.user.settings.locale);
@@ -431,4 +443,14 @@ export class GfUserAccountSettingsComponent implements OnInit {
 
     this.changeDetectorRef.markForCheck();
   }
+
+  private updateBaseCurrencyFormState() {
+    // The base currency belongs to the impersonated user while a change would be
+    // applied to the authenticated user
+    if (!this.hasImpersonationId && this.hasPermissionToUpdateUserSettings) {
+      this.baseCurrencyForm.enable({ emitEvent: false });
+    } else {
+      this.baseCurrencyForm.disable({ emitEvent: false });
+    }
+  }
 }
diff --git a/apps/client/src/app/pages/portfolio/analysis/analysis-page.html b/apps/client/src/app/pages/portfolio/analysis/analysis-page.html
index 82751b882..3d22f0c68 100644
--- a/apps/client/src/app/pages/portfolio/analysis/analysis-page.html
+++ b/apps/client/src/app/pages/portfolio/analysis/analysis-page.html
@@ -137,6 +137,7 @@
         [benchmarkDataItems]="benchmarkDataItems"
         [benchmarks]="benchmarks"
         [colorScheme]="user?.settings?.colorScheme"
+        [hasPermissionToUpdateUserSettings]="!impersonationId"
         [isLoading]="isLoadingBenchmarkComparator || isLoadingInvestmentChart"
         [locale]="user?.settings?.locale"
         [performanceDataItems]="performanceDataItemsInPercentage"
diff --git a/apps/client/src/app/pages/portfolio/fire/fire-page.html b/apps/client/src/app/pages/portfolio/fire/fire-page.html
index 13693a15a..7315f10cb 100644
--- a/apps/client/src/app/pages/portfolio/fire/fire-page.html
+++ b/apps/client/src/app/pages/portfolio/fire/fire-page.html
@@ -21,7 +21,7 @@
           [locale]="user?.settings?.locale"
           [projectedTotalAmount]="user?.settings?.projectedTotalAmount"
           [retirementDate]="user?.settings?.retirementDate"
-          [savingsRate]="hasImpersonationId ? 0 : user?.settings?.savingsRate"
+          [savingsRate]="user?.settings?.savingsRate"
           [style.opacity]="
             user?.subscription?.type === 'Basic' ? '0.67' : 'initial'
           "
diff --git a/libs/common/src/lib/helper.spec.ts b/libs/common/src/lib/helper.spec.ts
index 6cc090170..db3f9677d 100644
--- a/libs/common/src/lib/helper.spec.ts
+++ b/libs/common/src/lib/helper.spec.ts
@@ -12,8 +12,10 @@ import {
   isCurrency,
   isCurrencySymbol,
   isSplitRatio,
-  isValidCustomAssetProfileSymbol
+  isValidCustomAssetProfileSymbol,
+  resolveUserSettings
 } from '@ghostfolio/common/helper';
+import { UserSettings } from '@ghostfolio/common/interfaces';
 
 describe('Helper', () => {
   describe('Extract number from string', () => {
@@ -380,4 +382,118 @@ describe('Helper', () => {
       ).toEqual(true);
     });
   });
+
+  describe('Resolve user settings', () => {
+    const userSettings: UserSettings = {
+      baseCurrency: 'CHF',
+      colorScheme: 'DARK',
+      dateRange: '1y',
+      emergencyFund: 10000,
+      language: 'de',
+      locale: 'de-CH',
+      savingsRate: 500,
+      viewMode: 'DEFAULT'
+    };
+
+    const impersonationUserSettings: UserSettings = {
+      baseCurrency: 'USD',
+      colorScheme: 'LIGHT',
+      dateRange: 'ytd',
+      emergencyFund: 25000,
+      language: 'en',
+      locale: 'en-US',
+      savingsRate: 1000,
+      viewMode: 'ZEN'
+    };
+
+    it('Without impersonation', () => {
+      expect(
+        resolveUserSettings({
+          userSettings,
+          impersonationUserSettings: undefined
+        })
+      ).toEqual(userSettings);
+    });
+
+    it('Portfolio settings follow the impersonated user', () => {
+      const { baseCurrency, emergencyFund, savingsRate } = resolveUserSettings({
+        impersonationUserSettings,
+        userSettings
+      });
+
+      expect({ baseCurrency, emergencyFund, savingsRate }).toEqual({
+        baseCurrency: 'USD',
+        emergencyFund: 25000,
+        savingsRate: 1000
+      });
+    });
+
+    it('Presentation settings stay with the authenticated user', () => {
+      const { colorScheme, dateRange, language, locale, viewMode } =
+        resolveUserSettings({ impersonationUserSettings, userSettings });
+
+      expect({ colorScheme, dateRange, language, locale, viewMode }).toEqual({
+        colorScheme: 'DARK',
+        dateRange: '1y',
+        language: 'de',
+        locale: 'de-CH',
+        viewMode: 'DEFAULT'
+      });
+    });
+
+    it('Filters stay with the authenticated user', () => {
+      // The filters are always written back to the authenticated user, so
+      // reading them from the impersonated user would overwrite them
+      const { 'filters.accounts': filtersAccounts } = resolveUserSettings({
+        impersonationUserSettings: {
+          'filters.accounts': ['3b3c2b5d-5a4f-4b0a-9d4f-9b1f5e6a7c8d']
+        },
+        userSettings: {
+          'filters.accounts': ['0a1b2c3d-4e5f-6a7b-8c9d-0e1f2a3b4c5d']
+        }
+      });
+
+      expect(filtersAccounts).toEqual(['0a1b2c3d-4e5f-6a7b-8c9d-0e1f2a3b4c5d']);
+    });
+
+    it('Presentation settings unset for the authenticated user do not leak', () => {
+      // An unset presentation setting must not fall back to the impersonated
+      // user, otherwise their appearance and language apply to the
+      // authenticated user
+      const { colorScheme, language, locale } = resolveUserSettings({
+        impersonationUserSettings,
+        userSettings: { baseCurrency: 'CHF' }
+      });
+
+      expect(colorScheme).toBeUndefined();
+      expect(language).toBeUndefined();
+      expect(locale).toBeUndefined();
+    });
+
+    it('Unknown settings default to the impersonated user', () => {
+      // A setting which is not classified as presentation must not leak from
+      // the authenticated user into the impersonated portfolio
+      expect(
+        resolveUserSettings({
+          userSettings: { annualInterestRate: 3 },
+          impersonationUserSettings: { annualInterestRate: 5 }
+        }).annualInterestRate
+      ).toEqual(5);
+    });
+
+    it('Impersonated user without settings', () => {
+      expect(
+        resolveUserSettings({
+          userSettings,
+          impersonationUserSettings: {}
+        })
+      ).toEqual({
+        colorScheme: 'DARK',
+        dateRange: '1y',
+        language: 'de',
+        locale: 'de-CH',
+        viewMode: 'DEFAULT'
+      });
+    });
+  });
 });
diff --git a/libs/common/src/lib/helper.ts b/libs/common/src/lib/helper.ts
index d67abe03c..2e4125ea9 100644
--- a/libs/common/src/lib/helper.ts
+++ b/libs/common/src/lib/helper.ts
@@ -51,7 +51,8 @@ import {
   AssetProfileIdentifier,
   AssetProfileItem,
   Benchmark,
-  PortfolioPosition
+  PortfolioPosition,
+  UserSettings
 } from './interfaces';
 import { BenchmarkTrend, ColorScheme } from './types';
 
@@ -59,6 +60,28 @@ export const DATE_FORMAT = 'yyyy-MM-dd';
 export const DATE_FORMAT_MONTHLY = 'MMMM yyyy';
 export const DATE_FORMAT_YEARLY = 'yyyy';
 
+// Settings which describe the person looking at the screen rather than the
+// portfolio being looked at. They stay with the authenticated user while
+// impersonating. Every other setting follows the impersonated user.
+// The filters are included because they are always written back to the
+// authenticated user, so reading them from the impersonated user would
+// overwrite the filters of the authenticated user.
+const PRESENTATION_USER_SETTINGS_KEYS: (keyof UserSettings)[] = [
+  'colorScheme',
+  'dateRange',
+  'filters.accounts',
+  'filters.assetClasses',
+  'filters.dataSource',
+  'filters.symbol',
+  'filters.tags',
+  'holdingsViewMode',
+  'isExperimentalFeatures',
+  'isRestrictedView',
+  'language',
+  'locale',
+  'viewMode'
+];
+
 export function applyAssetProfileOverrides<T extends Partial<SymbolProfile>>(
   assetProfile: T,
   assetProfileOverrides: AssetProfileOverrides | null
@@ -670,3 +693,24 @@ export function resolveMarketCondition(
     return { emoji: undefined };
   }
 }
+
+export function resolveUserSettings({
+  impersonationUserSettings,
+  userSettings
+}: {
+  impersonationUserSettings?: UserSettings;
+  userSettings: UserSettings;
+}): UserSettings {
+  if (!impersonationUserSettings) {
+    return { ...userSettings };
+  }
+
+  return {
+    ...impersonationUserSettings,
+    ...Object.fromEntries(
+      PRESENTATION_USER_SETTINGS_KEYS.map((key) => {
+        return [key, userSettings?.[key]];
+      })
+    )
+  };
+}