How to delete artwork in the new iTunes?

Question

With the new iTunes having been installed a night or two ago, I cannot seem to easily manage the album artwork of my songs anymore.
When I hit "Get Info" and go to the "Artwork" tab, the only way to add art is by clicking "Add Artwork" and manually searching for it in my drives. I no longer can simply copy and paste. I also cannot even do anything with the currently existing artwork; right clicking it does literally nothing. Highlighting and hitting "delete" on the keyboard also does nothing. So, granted these new extremely limited options (again, I can literally only "Add Artwork"), how does one go about deleting already-existing artwork?
In most cases, adding artwork did seem to automatically delete any previously existing one, which is exactly what I needed. But for a couple of cases, adding artwork only added the image to the "Art Gallery" instead of actually overlapping the old art, and there is zero option to delete either of the two similar images. Any insight?

Answer 1

The iTunes 12 Get Info dialog lacks right-click context menus but accepts most standard keyboard shortcuts and drag & drop actions.
Delete Artwork
On the artwork tab of Get Into, tap the image in question, use Backspace or Ctrl+X. Delete doesn't work.
Or, tap the image at the top left of Get Info, this time use Backspace or Delete, it is Ctrl+X that doesn't work.
Add Artwork
Select artwork, press Ctrl+C to copy, tap the center of the Artwork tab, press Ctrl+V to paste.
Or, select artwork, press Ctrl+C to copy, tap the small image area at the top left, press Ctrl+V to paste.
Or, you can drag & drop to, or sometimes from, the same locations.
You can also copy artwork from the Get Info dialog to Windows Explorer with the keyboard shortcuts.
If the source image is on a web page right-click and use Copy Image rather than copy.
If you have multiple images embedded drag the one you want to be the primary artwork to the leftmost position.
The top left image box can be used to add or delete art from multiple tracks. In either case all existing art is removed/replaced.
Old Style Get Info Dialog
Select some items, right-click, hold down shift, then click Get Info from the context menu. (Use alt/option on a Mac)
tt2