Folders fit too.
Drag a folder from Finder onto your shelf. Click to copy it or drag it out when you need it.

Keep text, images, and files beside your Dock, ready when you need them.
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Hold an image and draw two circles without releasing it.
Move your mouse and watch your cat follow the fish.
Let go and your cat brings the image to the shelf.
Drop images onto your shelf to keep them handy. Drag them into the app you are working in when you need them.
Clipboard auto-collect
Turn on auto-collect to save copied text and images.
Press ⌃⌘C to turn clipboard auto-collect on or off.
Press ⌘C as usual. Your copied content appears on the shelf.
Click a clip to copy it or drag it into the app you need.
Pinned images stay on the shelf after you drag them out. Keep your favorites ready for the next time.
Drag a folder from Finder onto your shelf. Click to copy it or drag it out when you need it.
Press ⌃⌘K to open the search field above your shelf.
Hover over a card and press Space to open or close its preview.
Hold X and left-click a clip to remove it from the shelf. For files added from your desktop, only the shelf card is removed. The original file stays on your desktop.
Chases the fish.