How to delete graphic files

How do I go about deleting graphic files here in VirtualDR. I'm almost at my 976 KB limit and can't upload any more.

Thanks in advance,

Terry

Click "Settings" in the top right corner
Click "Attachments" under My Settings > Miscellaneous
Click "Show Thumbnails" to see the attachments
Check the box for each attachment you want to delete
OR
Check the box next to "Attachments Posted by <username>" to select all
Click "Delete Selected"