The Object menu is an object menu for the sheet object that is currently active.
It can be opened by choosing Object on the menu bar, or by clicking with the right mouse button on the sheet object.
Under some circumstances, e.g. when a sheet does not yet contain any sheet objects, the Object menu for the sheet is found as Object menu in the menu bar.
If there is more than one active sheet object, the Object menu contains the commands that are common to the active sheet objects.