diff --git a/apps/red-ui/src/app/modules/projects/components/pdf-viewer/pdf-viewer.component.ts b/apps/red-ui/src/app/modules/projects/components/pdf-viewer/pdf-viewer.component.ts
index 70e24b7b2..830be92a9 100644
--- a/apps/red-ui/src/app/modules/projects/components/pdf-viewer/pdf-viewer.component.ts
+++ b/apps/red-ui/src/app/modules/projects/components/pdf-viewer/pdf-viewer.component.ts
@@ -114,6 +114,14 @@ export class PdfViewerComponent implements OnInit, AfterViewInit, OnChanges {
                 }
             });
 
+            instance.annotManager.on('annotationChanged', (annotations) => {
+                // when a rectangle is drawn, it returns one annotation with tool name 'AnnotationCreateRectangle;
+                // this will auto select rectangle after drawing
+                if (annotations.length === 1 && annotations[0].ToolName === 'AnnotationCreateRectangle') {
+                    instance.annotManager.selectAnnotations(annotations);
+                }
+            });
+
             instance.docViewer.on('pageNumberUpdated', (p) => {
                 if (this.shouldDeselectAnnotationsOnPageChange) {
                     this.instance.annotManager.deselectAllAnnotations();