I've noticed that SOMETIMES in the context menus, the "shortcut key" for individual menu items is shown with an UNDERLINE under the key which activates the item.
Example: If you right click a thought, the press the "a" key will open the "add attachment" dialogue. I originally figured that out because at some point I saw the menu item displayed as "Add Attachment".
However, most of the time in most my brains those underlines are not there. I cannot figure out how to consitently turn that on?