diff --git a/client/src/app/shared/models/core/projector.ts b/client/src/app/shared/models/core/projector.ts
index 689ea8592..0da905990 100644
--- a/client/src/app/shared/models/core/projector.ts
+++ b/client/src/app/shared/models/core/projector.ts
@@ -56,6 +56,7 @@ export class Projector extends BaseModel<Projector> {
     public name: string;
     public width: number;
     public height: number;
+    public reference_projector_id: number;
     public projectiondefaults: ProjectionDefault[];
 
     public constructor(input?: any) {
diff --git a/client/src/app/site/base/base-repository.ts b/client/src/app/site/base/base-repository.ts
index ace9f4850..2f839440b 100644
--- a/client/src/app/site/base/base-repository.ts
+++ b/client/src/app/site/base/base-repository.ts
@@ -1,4 +1,4 @@
-import { BehaviorSubject, Observable } from 'rxjs';
+import { BehaviorSubject, Observable, Subject } from 'rxjs';
 
 import { OpenSlidesComponent } from '../../openslides.component';
 import { BaseViewModel } from './base-view-model';
@@ -24,6 +24,11 @@ export abstract class BaseRepository<V extends BaseViewModel, M extends BaseMode
      */
     protected readonly viewModelListSubject: BehaviorSubject<V[]> = new BehaviorSubject<V[]>([]);
 
+    /**
+     * Observable subject for any changes of view models.
+     */
+    protected readonly generalViewModelSubject: Subject<V> = new Subject<V>();
+
     /**
      * Construction routine for the base repository
      *
@@ -149,6 +154,13 @@ export abstract class BaseRepository<V extends BaseViewModel, M extends BaseMode
         return this.viewModelListSubject.asObservable().pipe(auditTime(1));
     }
 
+    /**
+     * This observable fires every time an object is changed in the repository.
+     */
+    public getGeneralViewModelObservable(): Observable<V> {
+        return this.generalViewModelSubject.asObservable();
+    }
+
     /**
      * Updates the ViewModel observable using a ViewModel corresponding to the id
      */
@@ -156,6 +168,7 @@ export abstract class BaseRepository<V extends BaseViewModel, M extends BaseMode
         if (this.viewModelSubjects[id]) {
             this.viewModelSubjects[id].next(this.viewModelStore[id]);
         }
+        this.generalViewModelSubject.next(this.viewModelStore[id]);
     }
 
     /**
diff --git a/client/src/app/site/projector/components/projector-list/projector-list.component.html b/client/src/app/site/projector/components/projector-list/projector-list.component.html
index af25775c3..ffb843980 100644
--- a/client/src/app/site/projector/components/projector-list/projector-list.component.html
+++ b/client/src/app/site/projector/components/projector-list/projector-list.component.html
@@ -73,6 +73,20 @@
                                 <span translate>Required</span>
                             </mat-hint>
                         </mat-form-field>
+
+                        <!-- Reference projector for the current list of speakers -->
+                        <h3 translate>Current list fo speakers reference</h3>
+                        <mat-form-field>
+                            <mat-select formControlName="reference_projector_id" placeholder="{{ 'Reference projector' | translate }}">
+                                <mat-option [value]="projector.id">
+                                    <span translate>self</span>
+                                </mat-option>
+                                <mat-option *ngFor="let refProjector of getReferenceProjectorsFor(projector)" [value]="refProjector.id">
+                                    <span>{{ refProjector.getTitle() | translate }}</span>
+                                </mat-option>
+                            </mat-select>
+                        </mat-form-field>
+
                         <h3 translate>Resolution and size</h3>
                         <!-- Aspect ratio field -->
                         <mat-radio-group formControlName="aspectRatio" [name]="projector.id">
@@ -82,6 +96,8 @@
                         </mat-radio-group>
                         <mat-slider [thumbLabel]="true" formControlName="width" min="800" max="3840" step="10"></mat-slider>
                         {{ updateForm.value.width }}
+
+                        <!-- Clock -->
                         <div>
                             <mat-checkbox formControlName="clock">
                                 <span translate>Show clock</span>
diff --git a/client/src/app/site/projector/components/projector-list/projector-list.component.ts b/client/src/app/site/projector/components/projector-list/projector-list.component.ts
index 9dba89597..50fe6ffa2 100644
--- a/client/src/app/site/projector/components/projector-list/projector-list.component.ts
+++ b/client/src/app/site/projector/components/projector-list/projector-list.component.ts
@@ -91,7 +91,8 @@ export class ProjectorListComponent extends BaseViewComponent implements OnInit
             name: ['', Validators.required],
             aspectRatio: ['', Validators.required],
             width: [0, Validators.required],
-            clock: [true]
+            clock: [true],
+            reference_projector_id: []
         });
     }
 
@@ -184,11 +185,16 @@ export class ProjectorListComponent extends BaseViewComponent implements OnInit
         }
         this.editId = projector.id;
         this.updateForm.reset();
+
+        const reference_projector_id = projector.reference_projector_id
+            ? projector.reference_projector_id
+            : projector.id;
         this.updateForm.patchValue({
             name: projector.name,
             aspectRatio: this.getAspectRatioKey(projector),
             width: projector.width,
-            clock: this.clockSlideService.isProjectedOn(projector)
+            clock: this.clockSlideService.isProjectedOn(projector),
+            reference_projector_id: reference_projector_id
         });
     }
 
@@ -215,7 +221,8 @@ export class ProjectorListComponent extends BaseViewComponent implements OnInit
         const updateProjector: Partial<Projector> = {
             name: this.updateForm.value.name,
             width: this.updateForm.value.width,
-            height: Math.round(this.updateForm.value.width / aspectRatios[this.updateForm.value.aspectRatio])
+            height: Math.round(this.updateForm.value.width / aspectRatios[this.updateForm.value.aspectRatio]),
+            reference_projector_id: this.updateForm.value.reference_projector_id
         };
         try {
             await this.clockSlideService.setProjectedOn(projector, this.updateForm.value.clock);
@@ -237,4 +244,14 @@ export class ProjectorListComponent extends BaseViewComponent implements OnInit
             this.repo.delete(projector).then(null, this.raiseError);
         }
     }
+
+    /**
+     * Get all available reference projectors for the given projector. These
+     * projectors are all existing projectors exluding the given projector
+     *
+     * @returns all available reference projectors
+     */
+    public getReferenceProjectorsFor(projector: ViewProjector): ViewProjector[] {
+        return this.repo.getViewModelList().filter(p => p.id !== projector.id);
+    }
 }
diff --git a/client/src/app/site/projector/models/view-projector.ts b/client/src/app/site/projector/models/view-projector.ts
index 99fa9f310..d7ebf3613 100644
--- a/client/src/app/site/projector/models/view-projector.ts
+++ b/client/src/app/site/projector/models/view-projector.ts
@@ -48,6 +48,10 @@ export class ViewProjector extends BaseViewModel {
         return this.projector ? this.projector.scroll : null;
     }
 
+    public get reference_projector_id(): number {
+        return this.projector ? this.projector.reference_projector_id : null;
+    }
+
     public constructor(projector?: Projector) {
         super();
         this._projector = projector;
diff --git a/client/src/app/site/projector/services/current-list-of-of-speakers-slide.service.ts b/client/src/app/site/projector/services/current-list-of-of-speakers-slide.service.ts
index bcb9ebdd1..0689d664e 100644
--- a/client/src/app/site/projector/services/current-list-of-of-speakers-slide.service.ts
+++ b/client/src/app/site/projector/services/current-list-of-of-speakers-slide.service.ts
@@ -2,6 +2,10 @@ import { Injectable } from '@angular/core';
 import { ProjectorService } from 'app/core/services/projector.service';
 import { ViewProjector } from '../models/view-projector';
 import { IdentifiableProjectorElement } from 'app/shared/models/core/projector';
+import { ProjectorRepositoryService } from './projector-repository.service';
+import { BehaviorSubject, Observable } from 'rxjs';
+import { SlideManager } from 'app/slides/services/slide-manager.service';
+import { AgendaBaseModel } from 'app/shared/models/base/agenda-base-model';
 
 /**
  */
@@ -9,8 +13,28 @@ import { IdentifiableProjectorElement } from 'app/shared/models/core/projector';
     providedIn: 'root'
 })
 export class CurrentListOfSpeakersSlideService {
-    public constructor(private projectorService: ProjectorService) {}
+    private currentItemIds: { [projectorId: number]: BehaviorSubject<number | null> } = {};
 
+    public constructor(
+        private projectorService: ProjectorService,
+        private projectorRepo: ProjectorRepositoryService,
+        private slideManager: SlideManager
+    ) {
+        this.projectorRepo.getGeneralViewModelObservable().subscribe(projector => {
+            const itemId = this.getCurrentAgendaItemIdForProjector(projector);
+            if (this.currentItemIds[projector.id]) {
+                this.currentItemIds[projector.id].next(itemId);
+            }
+        });
+    }
+
+    /**
+     * Returns the basic projector element for the CLOS slide. If overlay=True, the projector element
+     * will be the overlay instead of the slide.
+     *
+     * @param overlay Wether to have a slide or overlay
+     * @returns the identifiable CLOS projector element.
+     */
     private getCurrentListOfSpeakersProjectorElement(overlay: boolean): IdentifiableProjectorElement {
         return {
             name: overlay ? 'agenda/current-list-of-speakers-overlay' : 'agenda/current-list-of-speakers',
@@ -19,6 +43,51 @@ export class CurrentListOfSpeakersSlideService {
         };
     }
 
+    /**
+     * Returns an observable for the agenda item id of the currently projected element on the
+     * given projector.
+     *
+     * @param projector The projector to observe.
+     * @returns An observalbe for the agenda item id. Null, if no element with an agenda item is shown.
+     */
+    public getAgendaItemIdObservable(projector: ViewProjector): Observable<number | null> {
+        if (!this.currentItemIds[projector.id]) {
+            const itemId = this.getCurrentAgendaItemIdForProjector(projector);
+            this.currentItemIds[projector.id] = new BehaviorSubject<number | null>(itemId);
+        }
+        return this.currentItemIds[projector.id].asObservable();
+    }
+
+    /**
+     * Tries to get the agenda item id for one non stable element on the projector.
+     *
+     * @param projector The projector
+     * @returns The agenda item id or null, if there is no such projector element.
+     */
+    private getCurrentAgendaItemIdForProjector(projector: ViewProjector): number | null {
+        const nonStableElements = projector.elements.filter(element => !element.stable);
+        if (nonStableElements.length > 0) {
+            const nonStableElement = this.slideManager.getIdentifialbeProjectorElement(nonStableElements[0]); // The normal case is just one non stable slide
+            try {
+                const model = this.projectorService.getModelFromProjectorElement(nonStableElement);
+                if (model instanceof AgendaBaseModel) {
+                    // TODO: Use repositories associated to models
+                    return (<any>model).agenda_item_id;
+                }
+            } catch (e) {
+                // make TypeScript silent.
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Queries, if the slide/overlay is projected on the given projector.
+     *
+     * @param projector The projector
+     * @param overlay True, if we query for an overlay instead of the slide
+     * @returns if the slide/overlay is projected on the projector
+     */
     public isProjectedOn(projector: ViewProjector, overlay: boolean): boolean {
         return this.projectorService.isProjectedOn(
             this.getCurrentListOfSpeakersProjectorElement(overlay),
@@ -26,6 +95,12 @@ export class CurrentListOfSpeakersSlideService {
         );
     }
 
+    /**
+     * Toggle the projection state of the slide/overlay on the given projector
+     *
+     * @param projector The projector
+     * @param overlay Slide or overlay
+     */
     public async toggleOn(projector: ViewProjector, overlay: boolean): Promise<void> {
         const isClosProjected = this.isProjectedOn(projector, overlay);
         if (isClosProjected) {
diff --git a/client/src/app/slides/agenda/current-list-of-speakers-overlay/agenda-current-list-of-speakers-overlay-slide.component.ts b/client/src/app/slides/agenda/current-list-of-speakers-overlay/agenda-current-list-of-speakers-overlay-slide.component.ts
index fec60e277..8a467b9a2 100644
--- a/client/src/app/slides/agenda/current-list-of-speakers-overlay/agenda-current-list-of-speakers-overlay-slide.component.ts
+++ b/client/src/app/slides/agenda/current-list-of-speakers-overlay/agenda-current-list-of-speakers-overlay-slide.component.ts
@@ -1,7 +1,6 @@
-import { Component, OnInit } from '@angular/core';
+import { Component } from '@angular/core';
 
 import { BaseSlideComponent } from 'app/slides/base-slide-component';
-import { HttpService } from 'app/core/services/http.service';
 import { AgendaCurrentListOfSpeakersSlideData } from '../base/agenda-current-list-of-speakers-slide-data';
 
 @Component({
@@ -9,15 +8,10 @@ import { AgendaCurrentListOfSpeakersSlideData } from '../base/agenda-current-lis
     templateUrl: './agenda-current-list-of-speakers-overlay-slide.component.html',
     styleUrls: ['./agenda-current-list-of-speakers-overlay-slide.component.scss']
 })
-export class AgendaCurrentListOfSpeakersOverlaySlideComponent
-    extends BaseSlideComponent<AgendaCurrentListOfSpeakersSlideData>
-    implements OnInit {
-    public constructor(private http: HttpService) {
+export class AgendaCurrentListOfSpeakersOverlaySlideComponent extends BaseSlideComponent<
+    AgendaCurrentListOfSpeakersSlideData
+> {
+    public constructor() {
         super();
-        console.log(this.http);
-    }
-
-    public ngOnInit(): void {
-        console.log('Hello from current list of speakers overlay');
     }
 }
diff --git a/client/src/app/slides/agenda/current-list-of-speakers/agenda-current-list-of-speakers-slide.component.ts b/client/src/app/slides/agenda/current-list-of-speakers/agenda-current-list-of-speakers-slide.component.ts
index 31b21f2d2..436248765 100644
--- a/client/src/app/slides/agenda/current-list-of-speakers/agenda-current-list-of-speakers-slide.component.ts
+++ b/client/src/app/slides/agenda/current-list-of-speakers/agenda-current-list-of-speakers-slide.component.ts
@@ -14,7 +14,5 @@ export class AgendaCurrentListOfSpeakersSlideComponent extends BaseSlideComponen
         super();
     }
 
-    public ngOnInit(): void {
-        console.log('Hello from current list of speakers slide');
-    }
+    public ngOnInit(): void {}
 }
diff --git a/client/src/app/slides/core/countdown/core-countdown-slide.component.ts b/client/src/app/slides/core/countdown/core-countdown-slide.component.ts
index 5f1eb3250..466e44046 100644
--- a/client/src/app/slides/core/countdown/core-countdown-slide.component.ts
+++ b/client/src/app/slides/core/countdown/core-countdown-slide.component.ts
@@ -1,20 +1,14 @@
-import { Component, OnInit } from '@angular/core';
+import { Component } from '@angular/core';
 import { BaseSlideComponent } from 'app/slides/base-slide-component';
 import { CoreCountdownSlideData } from './core-countdown-slide-data';
-import { HttpService } from 'app/core/services/http.service';
 
 @Component({
     selector: 'os-core-countdown-slide',
     templateUrl: './core-countdown-slide.component.html',
     styleUrls: ['./core-countdown-slide.component.scss']
 })
-export class CoreCountdownSlideComponent extends BaseSlideComponent<CoreCountdownSlideData> implements OnInit {
-    public constructor(private http: HttpService) {
+export class CoreCountdownSlideComponent extends BaseSlideComponent<CoreCountdownSlideData> {
+    public constructor() {
         super();
-        console.log(this.http);
-    }
-
-    public ngOnInit(): void {
-        console.log('Hello from countdown slide');
     }
 }
diff --git a/client/src/app/slides/motions/motion/motions-motion-slide.component.ts b/client/src/app/slides/motions/motion/motions-motion-slide.component.ts
index c3b472a8b..080c4d6d6 100644
--- a/client/src/app/slides/motions/motion/motions-motion-slide.component.ts
+++ b/client/src/app/slides/motions/motion/motions-motion-slide.component.ts
@@ -1,4 +1,4 @@
-import { Component, OnInit } from '@angular/core';
+import { Component } from '@angular/core';
 import { BaseSlideComponent } from 'app/slides/base-slide-component';
 import { MotionsMotionSlideData } from './motions-motion-slide-data';
 
@@ -7,12 +7,8 @@ import { MotionsMotionSlideData } from './motions-motion-slide-data';
     templateUrl: './motions-motion-slide.component.html',
     styleUrls: ['./motions-motion-slide.component.scss']
 })
-export class MotionsMotionSlideComponent extends BaseSlideComponent<MotionsMotionSlideData> implements OnInit {
+export class MotionsMotionSlideComponent extends BaseSlideComponent<MotionsMotionSlideData> {
     public constructor() {
         super();
     }
-
-    public ngOnInit(): void {
-        console.log('Hello from motion slide');
-    }
 }
diff --git a/client/src/app/slides/users/user/users-user-slide.component.ts b/client/src/app/slides/users/user/users-user-slide.component.ts
index 33a6d43a2..e69e3ccd2 100644
--- a/client/src/app/slides/users/user/users-user-slide.component.ts
+++ b/client/src/app/slides/users/user/users-user-slide.component.ts
@@ -1,4 +1,4 @@
-import { Component, OnInit } from '@angular/core';
+import { Component } from '@angular/core';
 import { BaseSlideComponent } from 'app/slides/base-slide-component';
 import { UsersUserSlideData } from './users-user-slide-data';
 
@@ -7,12 +7,8 @@ import { UsersUserSlideData } from './users-user-slide-data';
     templateUrl: './users-user-slide.component.html',
     styleUrls: ['./users-user-slide.component.scss']
 })
-export class UsersUserSlideComponent extends BaseSlideComponent<UsersUserSlideData> implements OnInit {
+export class UsersUserSlideComponent extends BaseSlideComponent<UsersUserSlideData> {
     public constructor() {
         super();
     }
-
-    public ngOnInit(): void {
-        console.log('Hello from user slide');
-    }
 }
diff --git a/openslides/core/migrations/0016_projector_reference_projector.py b/openslides/core/migrations/0016_projector_reference_projector.py
new file mode 100644
index 000000000..ad8005d91
--- /dev/null
+++ b/openslides/core/migrations/0016_projector_reference_projector.py
@@ -0,0 +1,24 @@
+# Generated by Django 2.1.5 on 2019-01-31 10:24
+
+from django.db import migrations, models
+
+import openslides.utils.models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [("core", "0015_auto_20190122_1216")]
+
+    operations = [
+        migrations.AddField(
+            model_name="projector",
+            name="reference_projector",
+            field=models.ForeignKey(
+                blank=True,
+                null=True,
+                on_delete=openslides.utils.models.SET_NULL_AND_AUTOUPDATE,
+                related_name="references",
+                to="core.Projector",
+            ),
+        )
+    ]
diff --git a/openslides/core/models.py b/openslides/core/models.py
index 054996d5e..caa1c0778 100644
--- a/openslides/core/models.py
+++ b/openslides/core/models.py
@@ -84,6 +84,14 @@ class Projector(RESTModelMixin, models.Model):
 
     name = models.CharField(max_length=255, unique=True, blank=True)
 
+    reference_projector = models.ForeignKey(
+        "self",
+        on_delete=SET_NULL_AND_AUTOUPDATE,
+        null=True,
+        blank=True,
+        related_name="references",
+    )
+
     class Meta:
         """
         Contains general permissions that can not be placed in a specific app.
diff --git a/openslides/core/serializers.py b/openslides/core/serializers.py
index 5cf60a74a..a9d306434 100644
--- a/openslides/core/serializers.py
+++ b/openslides/core/serializers.py
@@ -97,6 +97,7 @@ class ProjectorSerializer(ModelSerializer):
             "name",
             "width",
             "height",
+            "reference_projector",
             "projectiondefaults",
         )
         read_only_fields = ("scale", "scroll")