These key bindings are common across all modes:
Quit speedbar, and kill the frame.
Quit speedbar, and hide the frame. This makes it faster to restore the speedbar frame, than if you press Q.
Refresh whatever contents are in speedbar.
Toggle speedbar to and from slowbar mode. In slowbar mode, frame tracking is not done.
Move, respectively, to the next or previous item. A summary of that item will be displayed in the attached frame’s minibuffer.
Move to the next or previous item in a restricted fashion. If a list is open, the cursor will skip over it. If the cursor is in an open list, it will not leave it.
Move forwards and backwards across extended groups. This lets you quickly skip over all files, directories, or other common sub-items at the same current depth.
Switch buffers in the attached frame.
Speedbar can handle multiple modes. Two are provided by default. These modes are File mode, and Buffers mode. There are accelerators to switch into these different modes.
Switch into Quick Buffers mode (see Buffer Mode). After one use, the previous display mode is restored.
Switch into File mode.
Switch back to the previous mode.
Some modes provide groups, lists and tags. See Basic Visuals. When these are available, some additional common bindings are available.
Edit/Open the current group or tag. This behavior is dependent on the mode. In general, files or buffers are opened in the attached frame, and directories or group nodes are expanded locally.
Expand the current group, displaying sub items. When used with a prefix argument, any data that may have been cached is flushed. This is similar to a power click. See Mouse Bindings.
Contract the current group, hiding sub items.