There are several faces speedbar generates to provide a consistent color scheme across display types. You can customize these faces using your favorite method. They are:
You can also customize speedbar's initial frame parameters. How this is accomplished is dependent on your platform being Emacs or XEmacs.
In Emacs, change the alist
variable is used to set up initial details. Height is also
automatically added when speedbar is created, though you can override
In XEmacs, change the plist
speedbar-frame-plist. This is the
XEmacs way of doing the same thing.