I'm fairly new to lightroom and for the last few weeks I have had a blue screen on the develop page when I select an image to edit. I originally thought I had cropped and fully zoomed in to a pixel but its obvious it isn't that as I have corrected the zoom sizes and still no difference.
Turn off the option to use the GPU in the performance tab of the LR preferences.
sorry I'm a novice how do I do that??
Open the LR preferences, Edit menu item > Preferences, go to the Performance tab