Blender 2.8 objects invisible I just added a collection and started to draw an object, and hid the other layers. But I cannot make the previous collection/layer to turn back on. The initial objects Only shows in render mode. in any other view mode, I cannot see the object. only the most recent layer shows up as shown in this image.
You seem to be in Local view, where only selected objects are displayed.

 

Hit /, or go to View > Local View > Toggle Local View (in the viewport header) to return to Global.