Camera view only shows half an image


I have run into a problem when it comes to viewing something in the Camera (Top View). I have moved the camera to look down. I’m planning a camera move through a multi-plane set.

Only half of the image shows. It’s as though a plane blocks the view, or part of the image is turned off - there isn’t a plane in the way if the camera to block the view. This is from the Open GL View. When I switch to Render View, everything is fine. However, that makes the process of blocking cumbersome and time-consuming. It would be ideal to do this in Open GL View. I have switched to “Display,” rather than “Display All,” but some of the artwork disappears (from the view only. The nodes are still there).

Any information or insights would be very much appreciated!

Many thanks.