Cairn
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Left-click a branch — highlights & centers its path.
Right-click a branch — opens its notes (editor in Editing mode, read-only view in Presenting mode).
Drag a branch onto another node — reconnects it there (Editing mode only).
Click empty space — fits the whole map to your screen.
The eye icon toggles notes previews on/off for every node at once.
Drag empty space to pan · scroll to zoom.
In the notes editor: Ctrl+B bold, Ctrl+H toggles a highlight, start a line with "- " for a bullet.
The pencil/presentation icon switches between Editing and Presenting — Presenting hides the add/delete/rename controls and shows notes as clean read-only text.