Deleting attachment from form
Click the red circle paperclip icon next to the form you wish to delete an attachment from

OR
Within the relevant form, click
Morein the top toolbar and selectFilesfrom the drop down menu.
A dialog will appear with all of the files attached to your form. Click the three dot icon the row of the attachment you wish to delete and select
Deletefrom the drop down menu.
Select
Yes, Deleteto delete the form, or selectCancel.