The following buttons are located in the bottom panel:
: hide/show minimaps.
: hide/show the online notifications window;
: hide/show the window with the messages from drivers or SMS;
: hide/show the window with the pictures from units;
: hide/show log;
: hide/show information on the latest system updates.
The lower right corner shows the current time and, in parentheses, a time zone (you can change it in the user settings).