citron provides system data via on-demand notifications, it is essentially an alternative to status bars that is meant to be used through keybindings defined in your window manager's configuration.
Check out the installation wiki page.
Check out the main wiki page.
This topic is documented in the provided manpage. If you've
installed citron through a package manager (with the exception of cargo), then
you may be able to view the manpage directly from your terminal by issuing man
citron
.