Hi, as the subject, how can I hide the default bottom toolbar inside the Qt Simulator?

When I start simulator there are 2 big cyan buttons (with no labels) and, after i click one of them, there is a default toolbar with the button to exit (backbutton) but i cannot find where is the option inside simulator settings to edit or hide this toolbar.

Please help, inside my project code there is no track about this default boottom toolbar .

Thank in advance,