Card visibility is a setting that allows you to either prioritize or hide cards in certain contexts and views.

This setting can be found under any card's ellipsis (...) menu.

Currently, there are three visibility settings: Priority, Visible, and Invisible.

This is the default. A visible card will generally just show up where you expect.

This is reserved for cards that are important and they will appear in a few more places than is normal. Notably, this is the Outline (the hierarchy of cards on the left of the screen), where only Priority cards are shown.

By default invisible cards are hidden from all your views.

To see invisible cards disable the Invisible filter (active by default) in the filters panel. Invisible cards will also never show up in the Command Prompt's global search feature.

You can modify what the default visibility of new cards is within Settings > App Preferences > Customize Behavior.

If you're writing lots of cards and finding your Outline is becoming a little too cluttered you can change the default Visibility to Visible, and then manually change cards to be Priority.