Clipboard history and Shelf are Tuna's working memory.

They solve related problems, but not the same one.

Clipboard History

Clipboard history is automatic.

When you copy something, Tuna can keep it around so you can use it again later as a normal subject.

That might be:

• text
• links
• files
• images
• colors

This is useful when "the thing I want" was something I copied five minutes ago.

Shelf

Shelf is intentional.

It is where Tuna keeps things you want to hold onto, plus results from background work.

That makes it a good place for:

• files or snippets you want to reuse across a few commands
• outputs from longer-running actions
• things you want to stage later without keeping Tuna open

You can think of Shelf as a tray, not a history log.

How They Fit Together

Clipboard history is the recent past.

Shelf is the active pile on your desk.

Both can become subjects in Tuna's normal command flow, which means you can still:

• open them
• copy them again
• send them into another action
• restage them for a new command

Typical Pattern

One common pattern is:

1. Copy something.
2. Reuse it from clipboard history.
3. Add the version you want to keep to Shelf.
4. Come back to it later.

That is why these features belong next to the command system instead of outside it.

Settings

Clipboard history can be enabled, limited, or ignored for specific apps in Tuna's Library settings.

Shelf has its own behavior settings too, like whether it stays on top and how it behaves when tasks finish.

What To Read Next

If you want the broader utility picture, read Built-In Tools.

If you want the exact keys for opening and navigating these tools, read Keyboard Shortcuts.