diff --git a/packages/uhk-common/src/config-serializer/config-items/user-configuration.ts b/packages/uhk-common/src/config-serializer/config-items/user-configuration.ts
index 67dd09cf..29880f96 100644
--- a/packages/uhk-common/src/config-serializer/config-items/user-configuration.ts
+++ b/packages/uhk-common/src/config-serializer/config-items/user-configuration.ts
@@ -1,9 +1,11 @@
-import { assertUInt8, assertUInt16 } from '../assert';
+import { assertUInt16, assertUInt8 } from '../assert';
 import { UhkBuffer } from '../uhk-buffer';
 import { Keymap } from './keymap';
 import { Macro } from './macro';
 import { ModuleConfiguration } from './module-configuration';
 import { ConfigSerializer } from '../config-serializer';
+import { KeystrokeAction } from './key-action';
+import { SecondaryRoleAction } from './secondary-role-action';
 
 export class UserConfiguration {
 
@@ -102,7 +104,9 @@ export class UserConfiguration {
             return macro;
         });
         this.keymaps = jsonObject.keymaps.map((keymap: any) => new Keymap().fromJsonObject(keymap, this.macros));
+        this.clean();
         this.recalculateConfigurationLength();
+
         return this;
     }
 
@@ -138,6 +142,8 @@ export class UserConfiguration {
         this.keymaps = buffer.readArray<Keymap>(uhkBuffer => new Keymap().fromBinary(uhkBuffer, this.macros));
         ConfigSerializer.resolveSwitchKeymapActions(this.keymaps);
 
+        this.clean();
+
         if (this.userConfigurationLength === 0) {
             this.recalculateConfigurationLength();
         }
@@ -222,4 +228,30 @@ export class UserConfiguration {
             this.deviceName = 'My UHK';
         }
     }
+
+    /* Remove not allowed settings/bugs
+     * 1. Layer Switcher secondary roles allowed only on base layers
+     */
+    private clean(): void {
+        for (const keymap of this.keymaps) {
+            for (let layerId = 1; layerId < keymap.layers.length; layerId++) {
+                const layer = keymap.layers[layerId];
+
+                for (const module of layer.modules) {
+                    for (let keyActionId = 0; keyActionId < module.keyActions.length; keyActionId++) {
+                        const keyAction = module.keyActions[keyActionId];
+                        if (!keyAction || !(keyAction instanceof KeystrokeAction)) {
+                            continue;
+                        }
+
+                        if (keyAction.secondaryRoleAction === SecondaryRoleAction.fn ||
+                            keyAction.secondaryRoleAction === SecondaryRoleAction.mod ||
+                            keyAction.secondaryRoleAction === SecondaryRoleAction.mouse) {
+                            (keyAction as any)._secondaryRoleAction = undefined;
+                        }
+                    }
+                }
+            }
+        }
+    }
 }
diff --git a/packages/uhk-web/src/app/components/popover/popover.component.html b/packages/uhk-web/src/app/components/popover/popover.component.html
index 0cbc25c5..07dc9ab3 100644
--- a/packages/uhk-web/src/app/components/popover/popover.component.html
+++ b/packages/uhk-web/src/app/components/popover/popover.component.html
@@ -48,11 +48,13 @@
     </div>
     <div [ngSwitch]="activeTab">
         <keypress-tab #tab *ngSwitchCase="tabName.Keypress" class="popover-content pr-10"
-                      [defaultKeyAction]="defaultKeyAction"
+                      [defaultKeyAction]="shadowKeyAction"
                       [secondaryRoleEnabled]="true"
                       [allowRemapOnAllKeymapWarning]="true"
                       [remapInfo]="remapInfo"
+                      [showLayerSwitcherInSecondaryRoles]="currentLayer === 0"
                       (validAction)="keyActionValid=$event"
+                      (keyActionChange)="keystrokeActionChange($event)"
         ></keypress-tab>
         <layer-tab #tab *ngSwitchCase="tabName.Layer" class="popover-content"
                    [defaultKeyAction]="defaultKeyAction"
@@ -87,10 +89,11 @@
                 </label>
             </div>
             <div class="checkbox">
-                <label>
+                <label [ngClass]="{ disabled: disableRemapOnAllLayer }">
                     <input type="checkbox"
                            name="remapOnAllLayer"
                            [(ngModel)]="remapInfo.remapOnAllLayer"
+                           [disabled]="disableRemapOnAllLayer"
                            (ngModelChange)="remapInfoChange()"> Remap on all layers
                 </label>
             </div>
diff --git a/packages/uhk-web/src/app/components/popover/popover.component.scss b/packages/uhk-web/src/app/components/popover/popover.component.scss
index 1be4d3c7..b2e543e1 100644
--- a/packages/uhk-web/src/app/components/popover/popover.component.scss
+++ b/packages/uhk-web/src/app/components/popover/popover.component.scss
@@ -125,5 +125,10 @@
 
     label {
         margin-right: 5px;
+
+        &.disabled {
+            cursor: not-allowed;
+            color: #959595;
+        }
     }
 }
diff --git a/packages/uhk-web/src/app/components/popover/popover.component.ts b/packages/uhk-web/src/app/components/popover/popover.component.ts
index ecf6a09a..f22b8070 100644
--- a/packages/uhk-web/src/app/components/popover/popover.component.ts
+++ b/packages/uhk-web/src/app/components/popover/popover.component.ts
@@ -1,5 +1,6 @@
 import {
     ChangeDetectionStrategy,
+    ChangeDetectorRef,
     Component,
     ElementRef,
     EventEmitter,
@@ -24,6 +25,7 @@ import {
     KeystrokeAction,
     MouseAction,
     PlayMacroAction,
+    SecondaryRoleAction,
     SwitchKeymapAction,
     SwitchLayerAction
 } from 'uhk-common';
@@ -104,10 +106,13 @@ export class PopoverComponent implements OnChanges {
     topPosition: number = 0;
     leftPosition: number = 0;
     animationState: string;
+    shadowKeyAction: KeyAction;
+    disableRemapOnAllLayer = false;
 
     private readonly currentKeymap$ = new BehaviorSubject<Keymap>(undefined);
 
-    constructor(store: Store<AppState>) {
+    constructor(private store: Store<AppState>,
+                private cdRef: ChangeDetectorRef) {
         this.animationState = 'closed';
         this.keymaps$ = store.let(getKeymaps())
             .combineLatest(this.currentKeymap$)
@@ -123,8 +128,10 @@ export class PopoverComponent implements OnChanges {
 
         if (change['defaultKeyAction']) {
             let tab: TabName;
+            this.disableRemapOnAllLayer = false;
 
             if (this.defaultKeyAction instanceof KeystrokeAction) {
+                this.keystrokeActionChange(this.defaultKeyAction);
                 tab = TabName.Keypress;
             } else if (this.defaultKeyAction instanceof SwitchLayerAction) {
                 tab = TabName.Layer;
@@ -188,6 +195,9 @@ export class PopoverComponent implements OnChanges {
 
     selectTab(tab: TabName): void {
         this.activeTab = tab;
+        if (tab === TabName.Keypress) {
+            this.keystrokeActionChange(this.defaultKeyAction as KeystrokeAction);
+        }
     }
 
     onOverlay() {
@@ -198,6 +208,26 @@ export class PopoverComponent implements OnChanges {
         this.selectedTab.remapInfoChanged(this.remapInfo);
     }
 
+    keystrokeActionChange(keystrokeAction: KeystrokeAction): void {
+        this.shadowKeyAction = keystrokeAction;
+        const disableRemapOnAllLayer =
+            keystrokeAction &&
+            this.currentLayer === 0 &&
+            (keystrokeAction.secondaryRoleAction === SecondaryRoleAction.fn ||
+                keystrokeAction.secondaryRoleAction === SecondaryRoleAction.mod ||
+                keystrokeAction.secondaryRoleAction === SecondaryRoleAction.mouse);
+
+        if (this.disableRemapOnAllLayer !== disableRemapOnAllLayer) {
+            this.disableRemapOnAllLayer = disableRemapOnAllLayer;
+
+            if (disableRemapOnAllLayer) {
+                this.remapInfo.remapOnAllLayer = false;
+            }
+
+            this.cdRef.markForCheck();
+        }
+    }
+
     private calculatePosition() {
         const offsetLeft: number = this.wrapPosition.left + 265; // 265 is a width of the side menu with a margin
         const popover: HTMLElement = this.popoverHost.nativeElement;
diff --git a/packages/uhk-web/src/app/components/popover/tab/keypress/keypress-tab.component.ts b/packages/uhk-web/src/app/components/popover/tab/keypress/keypress-tab.component.ts
index 9441f447..58e789ea 100644
--- a/packages/uhk-web/src/app/components/popover/tab/keypress/keypress-tab.component.ts
+++ b/packages/uhk-web/src/app/components/popover/tab/keypress/keypress-tab.component.ts
@@ -1,4 +1,13 @@
-import { ChangeDetectionStrategy, ChangeDetectorRef, Component, Input, OnChanges } from '@angular/core';
+import {
+    ChangeDetectionStrategy,
+    ChangeDetectorRef,
+    Component,
+    EventEmitter,
+    Input,
+    OnChanges,
+    Output,
+    SimpleChanges
+} from '@angular/core';
 import { KeyAction, KeystrokeAction, KeystrokeType, SCANCODES, SECONDARY_ROLES } from 'uhk-common';
 
 import { Tab } from '../tab';
@@ -8,6 +17,16 @@ import { KeyModifierModel } from '../../../../models/key-modifier-model';
 import { mapLeftRigthModifierToKeyActionModifier } from '../../../../util';
 import { RemapInfo } from '../../../../models/remap-info';
 
+export const secondaryRoleFilter = (showLayerSwitchers: boolean) => {
+    return (data): boolean => {
+        if (showLayerSwitchers) {
+            return data;
+        }
+
+        return data.text !== 'Layer switcher';
+    };
+};
+
 @Component({
     selector: 'keypress-tab',
     changeDetection: ChangeDetectionStrategy.OnPush,
@@ -19,12 +38,15 @@ export class KeypressTabComponent extends Tab implements OnChanges {
     @Input() secondaryRoleEnabled: boolean;
     @Input() allowRemapOnAllKeymapWarning: boolean;
     @Input() remapInfo: RemapInfo;
+    @Input() showLayerSwitcherInSecondaryRoles: boolean;
+
+    @Output() keyActionChange = new EventEmitter<KeystrokeAction>();
 
     leftModifiers: KeyModifierModel[];
     rightModifiers: KeyModifierModel[];
 
     scanCodeGroups: Array<SelectOptionData>;
-    secondaryRoleGroups: Array<SelectOptionData>;
+    secondaryRoleGroups: Array<SelectOptionData> = [];
 
     selectedScancodeOption: SelectOptionData;
     selectedSecondaryRoleIndex: number;
@@ -41,14 +63,16 @@ export class KeypressTabComponent extends Tab implements OnChanges {
             text: 'None'
         }];
         this.scanCodeGroups = this.scanCodeGroups.concat(SCANCODES);
-        this.secondaryRoleGroups = SECONDARY_ROLES;
         this.selectedScancodeOption = this.scanCodeGroups[0];
         this.selectedSecondaryRoleIndex = -1;
     }
 
-    ngOnChanges() {
+    ngOnChanges(changes: SimpleChanges) {
+        if (changes.showLayerSwitcherInSecondaryRoles) {
+            this.fillSecondaryRoles();
+        }
         this.fromKeyAction(this.defaultKeyAction);
-        this.keyActionChanged();
+        this.keyActionChanged(false);
     }
 
     keyActionValid(keystrokeAction?: KeystrokeAction): boolean {
@@ -124,6 +148,7 @@ export class KeypressTabComponent extends Tab implements OnChanges {
 
     onSecondaryRoleChange(id: string) {
         this.selectedSecondaryRoleIndex = +id;
+        this.keyActionChanged();
     }
 
     onScancodeChange(id: string) {
@@ -200,10 +225,14 @@ export class KeypressTabComponent extends Tab implements OnChanges {
         return [scanCode, type];
     }
 
-    private keyActionChanged(): void {
+    private keyActionChanged(dispatch = true): void {
         const keystrokeAction = this.toKeyAction();
         this.validAction.emit(this.keyActionValid(keystrokeAction));
         this.calculateRemapOnAllLayerWarningVisibility(keystrokeAction);
+
+        if (dispatch) {
+            this.keyActionChange.emit(keystrokeAction);
+        }
     }
 
     private calculateRemapOnAllLayerWarningVisibility(keystrokeAction: KeystrokeAction): void {
@@ -214,4 +243,9 @@ export class KeypressTabComponent extends Tab implements OnChanges {
             !keystrokeAction.hasScancode() &&
             keystrokeAction.hasOnlyOneActiveModifier();
     }
+
+    private fillSecondaryRoles(): void {
+        this.secondaryRoleGroups = SECONDARY_ROLES
+            .filter(secondaryRoleFilter(this.showLayerSwitcherInSecondaryRoles));
+    }
 }