I opened a drawing that I haven't worked on for a while and I wanted to change the viewport scale. My viewport is on the DEFPOINT layer and for some reason I am not able to select that layer at all, either in paper or model space. I checked my layer manager and it is not locked or frozen. I can change the color for that layer, but that's about it, I can't select any of it. Would anyone know what's going on with this layer?