Bring to Front
Moves the selected object to the top of the stacking order, so that it is in front of other objects.
Choose Format - Arrange - Bring to Front (Collabora Office Writer, Collabora Office Calc).
Choose Shape - Arrange - Bring to Front (Collabora Office Draw).
Shift+CommandCtrl+plus sign (Collabora Office Impress, Collabora Office Draw).
Open context menu - choose Arrange - Bring to Front (Collabora Office Impress).
Bring to Front