A useful tip if (a) you use a BetterTouchTool, and (b) like me, you have difficulty remembering all the keyboard shortcuts that you have set for scripts and menu items in DEVONthink:
assign your keyboard shortcuts to the same gesture in BetterTouchTool, and the gesture will then invoke a pop-up menu with descriptions for the shortcuts that you set in BTT. You can then trigger the action associated with the shortcut from the menu, or simply use it to remind yourself of the shortcuts available.
Note: the gesture can be set to be global or specific to DEVONthink/agent.
Apologies if this is well-known, but it was new to me.