Vaya a Formato ▸ Organizar ▸ Enviar al fondo (Collabora Office Writer, %[officename] Calc).
Vaya a Forma ▸ Organizar ▸ Enviar al fondo (Collabora Office Draw).
⇧⌘-Mayús + Ctrl + signo de resta (Collabora Office Impress, Collabora Office Draw)
Open context menu - choose Arrange - Send to Back (Collabora Office Impress).