⌘3 - Three pane layout (journals + notes + editor)
⌘+ - Zoom in on editor text
⌘- - Zoom out on editor text
⌘0 - Reset editor text to actual size
Editor:
⌘S - Save current note in the frontmost window
⌘E - Cycle through editor modes (Markdown ↔ WYSIWYG)
⌘⇧Y - Toggle Formatting Toolbar in the frontmost note window
⌘K - Add a link to another note when the note editor is focused. Uses selected text when available; without a selection, inserts a link using the destination note’s title at the cursor.
⌘⇧B - Toggle/apply a bullet list in the frontmost note editor