At the outset I need to say that the freezing occurs sometimes as I expand my knowledge! I have now been using adjustment layers successfully as per the tutorials. On occasions the window freezes. My work around is the dependable CTL ALT DEL which usually unfreezes the display. On other occasions it closes Affinity Pro down. I wonder if I am being to quick with keying my mouse? My PC has an Intel Corei7 and the display use Nvidia Quadro. I recently had a windows update - was that the problem?
Your advice please as I wish to master this! Many thanks, Mike