The problem is a simple one (I think), most likely of my making.
When editing in the Timeline-mode, the various media elements (images, videos, etc appear as solid blocks of colour. The actual images do not appear and neither do the ‘Object Handles’ within each of the elements.
I think that I’ve hit a setting inadvertently and created this problem. My question is: How do I restore it to the default view?
Your assistance will be much appreciated.
Many thanks