Choose Format - Arrange - Bring to Front (LibreOfficeDev Writer, LibreOfficeDev Calc).
Choose Shape - Arrange - Bring to Front (LibreOfficeDev Draw).
Shift+CommandCtrl+plus sign (LibreOfficeDev Impress, LibreOfficeDev Draw).
Open context menu - choose Arrange - Bring to Front (LibreOfficeDev Impress).