You can edit the instance description while in the model. It is the most convenient way to detect and resolve issues or add missing content.

Currently I am unable to insert an image from my clipboard due to a bug with a dialog box to name the image. The dialog box has a field to name the file which you cannot edit. Clicking with the cursor or using tab still doesn't allow this field to be selectable. If you click submit, it will remove the image from the description due to the name being blank.