You can also use the speedbar
(see the section
Speedbar Frames in The GNU Emacs Manual)
to view your folders. To bring up the speedbar, run M-x speedbar
RET. You will see a new frame appear with all of your MH
folders. Folders with unseen messages appear in boldface. Click on a
folder name with mouse-2 to visit that folder in a similar
fashion to the command F v (mh-visit-folder)
(see Organizing Your Mail with Folders). Click on the ‘+’ icon to expand and view the
sub-folders of that folder.
The speedbar can be manipulated with the keyboard as well. Use the Emacs navigational keys (like the arrow keys, or C-n) to move the cursor over the desired folder and then use the shortcuts for the menu items listed in the table below.
Visits the selected folder just as if you had used F v
(mh-speed-view).
Expands the selected folder in the speedbar, exposing the children
folders inside it (mh-speed-expand-folder).
Contracts or collapses the selected folder in the speedbar, hiding the
children folders inside it (mh-speed-contract-folder).
Regenerates the list of folders in the speedbar. Run this command if
you’ve added or deleted a folder, or want to update the unseen message
count before the next automatic update (mh-speed-refresh).
You can click on mouse-3 to bring up a context menu that
contains these items. Dismiss the speedbar with C-x 5 0
(delete-frame).
The MH-E speedbar uses the MH command flists47 to generate the list of
folders. The ‘mh-speedbar’ customization group contains the
following option which controls how often the speedbar calls
flists.
mh-speed-update-interval ¶Time between speedbar updates in seconds (default: 60). Set to 0 to disable automatic update.
You can modify the appearance of the folders in the speedbar by customizing the following faces.