The status bar displays information, which is also available in the statistics window.
The second field shows (Outstanding items+Outstanding topics)/(maximum Outstanding). It illustrates how many outstanding elements scheduled for the current day have yet to be repeated (the first two numbers connected with a plus sign) or have to be rehearsed yet with the final drill (the third number, if present). The progress bar displays the same information in the graphic form. The blue color shows the proportion of elements passed successfully (i.e. with the grade Bright (5) or Good (4)). The red color shows the proportion of elements passed with the grade less than Good (4). And the white color shows the proportion of elements that have not yet been passed.
The right part of the status bar is used to display hints for menu items, buttons, statistical parameters, etc. As you have probably noticed, this part becomes yellow as soon as the mouse pointer moves over a screen component such as button, menu item, etc. You can double click the hint display area to turn the hints on and off