Display a custom status at the end of the echo area
The format of the echo bar can be set using the echo-bar-format variable. This variable uses the same format as mode-line-format.
Alternatively, you can set echo-bar-function to a custom function to be run every time the echo bar updates, and the output of this function will be used as the contents of the echo bar.
Displayed at the end of the echo area
It will also be displayed at the end of the minibuffer
