Delete the selected annotations and regions of interest:

1. In an image, with the left mouse button, select the annotations and the regions of interest that you want to delete. Multiple annotations and regions of interest can be selected by clicking while holding the 'Shift' key. You can unselect one annotation or one region of interest by clicking on it while holding the 'Ctrl' key.
2. Hit the 'Del' key or select 'Delete the selected annotations' in the context menu (keep your mouse above the selected items, and click on the right mouse button to make the context menu visible).
3. Click 'Yes' to confirm the deletion.

Delete all the annotations and regions of interest in one or more images:

1. In a display area, select the images in which you want to delete all the annotations and regions of interest, by clicking on them while holding the 'Shift' key for continuous selection or the 'Ctrl' key for noncontiguous selection. Hit the 'A' key while holding the 'Ctrl' key to select all images.
2. In the top menu of the 2D Viewer window, open the "Annotations" menu by clicking on it.
3. Select "Delete All".
4. Click "Yes" to confirm the deletion.