diff --git a/src/views/trials/trials-panel/reading/visit-review/components/FileViewer.vue b/src/views/trials/trials-panel/reading/visit-review/components/FileViewer.vue
index 3d7b7156..fb9da17e 100644
--- a/src/views/trials/trials-panel/reading/visit-review/components/FileViewer.vue
+++ b/src/views/trials/trials-panel/reading/visit-review/components/FileViewer.vue
@@ -1013,6 +1013,7 @@ export default {
                 }
                 if (annotation.metadata.toolName === 'Lengthscale') {
                   this.$emit('getEcrf', { type: "changePlottingScaleChangeAnswer", VisitTaskId: this.taskInfo.VisitTaskId, noneDicomFileId: annotation.noneDicomFileId, path: annotation.path || '', picturePath: null, psArr: this.psArr, isRemovePlottingScale: false })
+                  this.setToolsPassive()
                 }
                 const renderingEngine = getRenderingEngine(renderingEngineId)
                 for (let i = 0; i < this.cells.length; i++) {