I have a master drawing with multiple xrefed building sketches. Looking at the model space on the "master" I can see all the room identities. However, if I go to the sheets that I have created and look at the viewports. The room identies are not there. The layer is called A-Room-Iden and it is on and not frozen...
Is the layer 'frozen in current viewport'? Which is different from the main frozen/thaw setting.
They may be blocks. The blocks may be inserted on the layer A-Room-Iden, but the entities that make up the block may be on a layer that is frozen in that Viewport.