trilium/docs/Developer Guide/Developer Guide/Development and architecture/Launchers.md

Launchers

Launchers are items that are displayed in the launcher bar (left side of the screen). They are of two different types:

• Visible launchers: are displayed by default to the user, can be moved to the available launchers section to hide them.
• Available launchers: can be manually added by the user from settings into the list of visible launchers.

Adding a new launcher

Regardless of the type, new launchers are added at server level, inside hidden_subtree.ts file.

• To add a new available launcher, look for _lbAvailableLaunchers and add a new item to its children.
• Similarly, to add a visible launcher, look for _lbVisibleLaunchers.
  • If you add a visible launcher, it will be available for both new and old users, since the application will identify that there is a new launcher to be added regardless of the user preference.