diff --git a/src/app/project/ontology/property-info/property-info.component.html b/src/app/project/ontology/property-info/property-info.component.html
index 65a6e95ee8..50fe17c85b 100644
--- a/src/app/project/ontology/property-info/property-info.component.html
+++ b/src/app/project/ontology/property-info/property-info.component.html
@@ -1,7 +1,7 @@
 <div class="property-info" (mouseenter)="mouseEnter()" (mouseleave)="mouseLeave()">
 
     <div mat-line class="title">
-        <span class="icon" *ngIf="propType" [matTooltip]="propType?.group + ': ' + propType?.label"
+        <span class="icon" *ngIf="propType" [matTooltip]="propType?.group + ': ' + propType?.label + ' (' + propDef.id.split('#')[1] + ')'"
             matTooltipPosition="above">
             <mat-icon class="type">{{propType?.icon}}</mat-icon>
         </span>
@@ -20,7 +20,7 @@
     </div>
 
     <div mat-line class="info additional-info" [class.flex]="propCard">
-        <span [matTooltip]="'id: ' + propDef.id" matTooltipPosition="above">
+        <span [matTooltip]="'id: ' + propDef.id" matTooltipPosition="above" class="mat-caption">
             {{propDef.id | split: '#':1}}
         </span>
         <span class="fill-remaining-space center">&nbsp;&middot;&nbsp;</span>
@@ -48,17 +48,16 @@
         </span>
     </div>
 
-    <div class="action-bubble" *ngIf="lastModificationDate && showActionBubble && projectStatus" [@simpleFadeAnimation]="'in'">
+    <div class="action-bubble" *ngIf="lastModificationDate && projectStatus && showActionBubble" [@simpleFadeAnimation]="'in'">
         <!-- property action in case of resource class' view has different buttons and actions -->
         <div class="button-container" *ngIf="propCard">
             <!-- TODO: edit cardinality is disabled for the moment. Will be activated as soon as we use DSP-API 13.9.1 -->
-            <button mat-button [disabled]="true" [matTooltip]="'Edit property and cardinality'">
+            <button mat-button [disabled]="true" [matTooltip]="'Edit property and cardinality'" matTooltipPosition="above">
                 <mat-icon>tune</mat-icon>
             </button>
-            <span
-                [matTooltip]="((resClasses.length > 0) ? 'The property can\'t be removed because it\'s in use' : 'Remove property from resource class')">
-                <!-- TODO: add "disabled" param as soon as we use DSP-API 13.9.1 and DSP-JS 2.4.0; use same value in matTooltip above  -->
-                <button mat-button class="delete"
+            <span matTooltipPosition="above"
+                [matTooltip]="((!propCanBeDeleted) ? 'The property can\'t be removed because it is in use' : 'Remove property from resource class')">
+                <button mat-button [disabled]="!propCanBeDeleted" class="delete"
                     (click)="removePropertyFromClass.emit({iri: propDef.id, label: propDef.label})">
                     <mat-icon>backspace</mat-icon>
                 </button>
@@ -66,12 +65,12 @@
         </div>
         <!-- property action in case of properties' list view -->
         <div class="button-container" *ngIf="!propCard">
-            <button mat-button [disabled]="!propDef.isEditable" class="edit" title="edit" [matTooltip]="'Edit property'"
+            <button mat-button [disabled]="!propDef.isEditable" class="edit" title="edit" [matTooltip]="'Edit property'" matTooltipPosition="above"
                 (click)="editResourceProperty.emit({propDef: propDef, propType: propType})">
                 <mat-icon>edit</mat-icon>
             </button>
-            <span
-                [matTooltip]="((resClasses.length > 0 || !propCanBeDeleted)? 'The property can\'t be deleted because it\'s used in a class' : 'Delete property')">
+            <span matTooltipPosition="above"
+                [matTooltip]="((resClasses.length > 0 || !propCanBeDeleted) ? 'The property can\'t be deleted because it is used in a class' : 'Delete property')">
                 <button mat-button [disabled]="resClasses.length > 0" class="delete"
                     (click)="deleteResourceProperty.emit({iri: propDef.id, label: propDef.label})">
                     <mat-icon>delete</mat-icon>
diff --git a/src/app/project/ontology/property-info/property-info.component.scss b/src/app/project/ontology/property-info/property-info.component.scss
index 5958d40253..4de6515bcb 100644
--- a/src/app/project/ontology/property-info/property-info.component.scss
+++ b/src/app/project/ontology/property-info/property-info.component.scss
@@ -24,6 +24,10 @@
 .mat-line.info {
   font-size: small;
 
+  .mat-caption {
+    color: rgba($dark, .7);
+  }
+
   .mat-icon {
     width: 12px;
     height: 12px;
diff --git a/src/app/project/ontology/property-info/property-info.component.spec.ts b/src/app/project/ontology/property-info/property-info.component.spec.ts
index c4e54014bc..f8e149208c 100644
--- a/src/app/project/ontology/property-info/property-info.component.spec.ts
+++ b/src/app/project/ontology/property-info/property-info.component.spec.ts
@@ -242,6 +242,16 @@ describe('PropertyInfoComponent', () => {
     });
 
     beforeEach(() => {
+        // mock cache service for currentOntology
+        const cacheSpy = TestBed.inject(CacheService);
+
+        (cacheSpy as jasmine.SpyObj<CacheService>).get.and.callFake(
+            () => {
+                const response: ReadOntology = MockOntology.mockReadOntology('http://0.0.0.0:3333/ontology/0001/anything/v2');
+                return of(response);
+            }
+        );
+
         simpleTextHostFixture = TestBed.createComponent(SimpleTextHostComponent);
         simpleTextHostComponent = simpleTextHostFixture.componentInstance;
         simpleTextHostFixture.detectChanges();
@@ -254,19 +264,6 @@ describe('PropertyInfoComponent', () => {
         overlayContainer = TestBed.inject(OverlayContainer);
         rootLoader = TestbedHarnessEnvironment.documentRootLoader(simpleTextHostFixture);
 
-    });
-
-    beforeEach(() => {
-        // mock cache service for currentOntology
-        const cacheSpy = TestBed.inject(CacheService);
-
-        (cacheSpy as jasmine.SpyObj<CacheService>).get.and.callFake(
-            () => {
-                const response: ReadOntology = MockOntology.mockReadOntology('http://0.0.0.0:3333/ontology/0001/anything/v2');
-                return of(response);
-            }
-        );
-
         linkHostFixture = TestBed.createComponent(LinkHostComponent);
         linkHostComponent = linkHostFixture.componentInstance;
         linkHostFixture.detectChanges();
diff --git a/src/app/project/ontology/property-info/property-info.component.ts b/src/app/project/ontology/property-info/property-info.component.ts
index 8019fcaf1b..825b828325 100644
--- a/src/app/project/ontology/property-info/property-info.component.ts
+++ b/src/app/project/ontology/property-info/property-info.component.ts
@@ -10,7 +10,9 @@ import {
     ReadOntology,
     ReadProject,
     ResourceClassDefinitionWithAllLanguages,
-    ResourcePropertyDefinitionWithAllLanguages
+    ResourcePropertyDefinitionWithAllLanguages,
+    UpdateOntology,
+    UpdateResourceClassCardinality
 } from '@dasch-swiss/dsp-js';
 import { CacheService } from 'src/app/main/cache/cache.service';
 import { DspApiConnectionToken } from 'src/app/main/declarations/dsp-api-tokens';
@@ -85,6 +87,8 @@ export class PropertyInfoComponent implements OnChanges, AfterContentInit {
 
     @Input() propCard?: IHasProperty;
 
+    @Input() resourceIri?: string;
+
     @Input() projectCode: string;
 
     @Input() projectStatus: boolean;
@@ -126,7 +130,15 @@ export class PropertyInfoComponent implements OnChanges, AfterContentInit {
         @Inject(DspApiConnectionToken) private _dspApiConnection: KnoraApiConnection,
         private _cache: CacheService,
         private _errorHandler: ErrorHandlerService
-    ) { }
+    ) {
+
+        this._cache.get('currentOntology').subscribe(
+            (response: ReadOntology) => {
+                this.ontology = response;
+
+            }
+        );
+    }
 
     ngOnChanges(): void {
 
@@ -179,31 +191,26 @@ export class PropertyInfoComponent implements OnChanges, AfterContentInit {
         if (this.propDef.isLinkProperty) {
             // this property is a link property to another resource class
             // get current ontology to get linked res class information
-            this._cache.get('currentOntology').subscribe(
-                (response: ReadOntology) => {
-                    this.ontology = response;
-                    // get the base ontology of object type
-                    const baseOnto = this.propDef.objectType.split('#')[0];
-                    if (baseOnto !== response.id) {
-                        // get class info from another ontology
-                        this._cache.get('currentProjectOntologies').subscribe(
-                            (ontologies: ReadOntology[]) => {
-                                const onto = ontologies.find(i => i.id === baseOnto);
-                                if (!onto && this.propDef.objectType === Constants.Region) {
-                                    this.propAttribute = 'Region';
-                                } else {
-                                    this.propAttribute = onto.classes[this.propDef.objectType].label;
-                                    this.propAttributeComment = onto.classes[this.propDef.objectType].comment;
-                                }
-                            }
-                        );
-                    } else {
-                        this.propAttribute = response.classes[this.propDef.objectType].label;
-                        this.propAttributeComment = response.classes[this.propDef.objectType].comment;
-                    }
 
-                }
-            );
+            // get the base ontology of object type
+            const baseOnto = this.propDef.objectType.split('#')[0];
+            if (baseOnto !== this.ontology.id) {
+                // get class info from another ontology
+                this._cache.get('currentProjectOntologies').subscribe(
+                    (ontologies: ReadOntology[]) => {
+                        const onto = ontologies.find(i => i.id === baseOnto);
+                        if (!onto && this.propDef.objectType === Constants.Region) {
+                            this.propAttribute = 'Region';
+                        } else {
+                            this.propAttribute = onto.classes[this.propDef.objectType].label;
+                            this.propAttributeComment = onto.classes[this.propDef.objectType].comment;
+                        }
+                    }
+                );
+            } else {
+                this.propAttribute = this.ontology.classes[this.propDef.objectType].label;
+                this.propAttributeComment = this.ontology.classes[this.propDef.objectType].comment;
+            }
         }
 
         if (this.propDef.objectType === Constants.ListValue) {
@@ -224,40 +231,71 @@ export class PropertyInfoComponent implements OnChanges, AfterContentInit {
         // get all classes where the property is used
         if (!this.propCard) {
 
-            this._cache.get('currentOntology').subscribe(
-                (response: ReadOntology) => {
-                    this.ontology = response;
-                    const classes = response.getAllClassDefinitions();
-                    for (const c of classes) {
-                        if (c.propertiesList.find(i => i.propertyIndex === this.propDef.id)) {
-                            this.resClasses.push(c as ResourceClassDefinitionWithAllLanguages);
-                        }
-                        // const splittedSubClass = ontology.classes[c].subClassOf[0].split('#');
-
-                        // if (splittedSubClass[0] !== Constants.StandoffOntology && splittedSubClass[1] !== 'StandoffTag' && splittedSubClass[1] !== 'StandoffLinkTag') {
-                        //     this.ontoClasses.push(this.ontology.classes[c]);
-                        // }
-                    }
+            const classes = this.ontology.getAllClassDefinitions();
+            for (const c of classes) {
+                if (c.propertiesList.find(i => i.propertyIndex === this.propDef.id)) {
+                    this.resClasses.push(c as ResourceClassDefinitionWithAllLanguages);
                 }
-            );
+                // const splittedSubClass = ontology.classes[c].subClassOf[0].split('#');
+
+                // if (splittedSubClass[0] !== Constants.StandoffOntology && splittedSubClass[1] !== 'StandoffTag' && splittedSubClass[1] !== 'StandoffLinkTag') {
+                //     this.ontoClasses.push(this.ontology.classes[c]);
+                // }
+            }
 
+        }
+    }
+
+    /**
+     * determines whether property can be deleted
+     * resp. removed from res class if we have the cardinality info
+     */
+    canBeDeleted() {
+        if (!this.propCard) {
             // check if the property can be deleted
             this._dspApiConnection.v2.onto.canDeleteResourceProperty(this.propDef.id).subscribe(
-                (response: CanDoResponse) => {
-                    this.propCanBeDeleted = response.canDo;
+                (canDoRes: CanDoResponse) => {
+                    this.propCanBeDeleted = canDoRes.canDo;
                 },
                 (error: ApiResponseError) => {
                     this._errorHandler.showMessage(error);
                 }
             );
-        }
+        } else {
+            // check if the property can be removed from res class
+            if (this.lastModificationDate) {
+                const onto = new UpdateOntology<UpdateResourceClassCardinality>();
+
+                onto.lastModificationDate = this.lastModificationDate;
 
+                onto.id = this.ontology.id;
+
+                const delCard = new UpdateResourceClassCardinality();
+
+                delCard.id = this.resourceIri;
+
+                delCard.cardinalities = [];
+
+                delCard.cardinalities = [this.propCard];
+                onto.entity = delCard;
+
+                this._dspApiConnection.v2.onto.canDeleteCardinalityFromResourceClass(onto).subscribe(
+                    (canDoRes: CanDoResponse) => {
+                        this.propCanBeDeleted = canDoRes.canDo;
+                    },
+                    (error: ApiResponseError) => {
+                        this._errorHandler.showMessage(error);
+                    }
+                );
+            }
+        }
     }
 
     /**
      * show action bubble with various CRUD buttons when hovered over.
      */
     mouseEnter() {
+        this.canBeDeleted();
         this.showActionBubble = true;
     }
 
diff --git a/src/app/project/ontology/resource-class-info/resource-class-info.component.html b/src/app/project/ontology/resource-class-info/resource-class-info.component.html
index 269e0c5da0..60ea63e148 100644
--- a/src/app/project/ontology/resource-class-info/resource-class-info.component.html
+++ b/src/app/project/ontology/resource-class-info/resource-class-info.component.html
@@ -3,7 +3,7 @@
     <mat-card-header class="resource-class-header" cdkDragHandle>
         <!-- TODO: the res class icon is missing in ClassDefinition from DSP-JS-Lib; DSP-JS has to be updated first (s. DSP-1366) -->
         <!-- <mat-icon mat-card-avatar>{{resourceClass.icon}}</mat-icon> -->
-        <mat-card-title [matTooltip]="resourceClass.comment" matTooltipPosition="above">
+        <mat-card-title [matTooltip]="resourceClass.comment + ' (' + resourceClass.id.split('#')[1] + ')'" matTooltipPosition="above">
             {{resourceClass.label | appTruncate: 24}}
         </mat-card-title>
         <mat-card-subtitle>
@@ -47,9 +47,9 @@
         <mat-list cdkDropList class="resource-class-properties" (cdkDropListDropped)="drop($event)"
             *ngIf="propsToDisplay.length; else noProperties">
             <div cdkDrag [cdkDragDisabled]="!ontology.lastModificationDate"
-                *ngFor="let prop of propsToDisplay; let i = index; let odd = odd">
+                *ngFor="let prop of propsToDisplay; let i = index;">
                 <div class="drag-n-drop-placeholder" *cdkDragPlaceholder></div>
-                <mat-list-item class="property" [class.odd]="odd">
+                <mat-list-item class="property">
                     <span cdkDragHandle mat-list-icon class="list-icon gui-order">
                         <span [class.hide-on-hover]="cardinalityUpdateEnabled && lastModificationDate">{{i + 1}})</span>
                         <span *ngIf="lastModificationDate && cardinalityUpdateEnabled"
@@ -60,7 +60,7 @@
                     <!-- display only properties if they exist in list of properties;
                      objectType is not a linkValue (otherwise we have the property twice) -->
                     <app-property-info class="property-info" [propDef]="ontology?.properties[prop.propertyIndex]"
-                        [propCard]="propsToDisplay[i]" [projectCode]="projectCode"
+                        [propCard]="propsToDisplay[i]" [projectCode]="projectCode" [projectStatus]="projectStatus" [resourceIri]="resourceClass.id"
                         [(lastModificationDate)]="lastModificationDate"
                         (removePropertyFromClass)="removeProperty($event)">
                     </app-property-info>
diff --git a/src/app/project/ontology/resource-class-info/resource-class-info.component.ts b/src/app/project/ontology/resource-class-info/resource-class-info.component.ts
index 67d7bacbc4..100f65f873 100644
--- a/src/app/project/ontology/resource-class-info/resource-class-info.component.ts
+++ b/src/app/project/ontology/resource-class-info/resource-class-info.component.ts
@@ -170,7 +170,7 @@ export class ResourceClassInfoComponent implements OnInit {
      */
     preparePropsToDisplay(classProps: IHasProperty[]) {
 
-        const ontoProps = this.ontology.getAllPropertyDefinitions();
+        const ontoProps = <ResourcePropertyDefinitionWithAllLanguages[]>this.ontology.getAllPropertyDefinitions();
 
         // reset properties to display
         this.propsToDisplay = [];
@@ -181,9 +181,8 @@ export class ResourceClassInfoComponent implements OnInit {
 
             const propToDisplay = ontoProps.find(obj =>
                 obj.id === hasProp.propertyIndex &&
-                (obj.objectType !== 'http://api.knora.org/ontology/knora-api/v2#LinkValue' ||
-                    (obj.subjectType && !obj.subjectType.includes('Standoff'))
-                )
+                ((!obj.isLinkValueProperty) || (obj.subjectType && !obj.subjectType.includes('Standoff')))
+
             );
 
             if (propToDisplay) {
@@ -294,19 +293,20 @@ export class ResourceClassInfoComponent implements OnInit {
 
         onto.id = this.ontology.id;
 
-        const addCard = new UpdateResourceClassCardinality();
+        const delCard = new UpdateResourceClassCardinality();
 
-        addCard.id = this.resourceClass.id;
+        delCard.id = this.resourceClass.id;
 
-        addCard.cardinalities = [];
+        delCard.cardinalities = [];
 
-        this.propsToDisplay = this.propsToDisplay.filter(prop => !(prop.propertyIndex === property.iri));
+        this.propsToDisplay = this.propsToDisplay.filter(prop => (prop.propertyIndex === property.iri));
 
-        addCard.cardinalities = this.propsToDisplay;
-        onto.entity = addCard;
+        delCard.cardinalities = this.propsToDisplay;
+        onto.entity = delCard;
 
-        this._dspApiConnection.v2.onto.replaceCardinalityOfResourceClass(onto).subscribe(
+        this._dspApiConnection.v2.onto.deleteCardinalityFromResourceClass(onto).subscribe(
             (res: ResourceClassDefinitionWithAllLanguages) => {
+
                 this.lastModificationDate = res.lastModificationDate;
                 this.lastModificationDateChange.emit(this.lastModificationDate);
                 this.preparePropsToDisplay(this.propsToDisplay);
@@ -316,7 +316,7 @@ export class ResourceClassInfoComponent implements OnInit {
                 this._notification.openSnackBar(`You have successfully removed "${property.label}" from "${this.resourceClass.label}".`);
             },
             (error: ApiResponseError) => {
-                this._errorHandler.showMessage(error);
+                this._errorHandler.showMessage(<ApiResponseError>error);
             }
         );