@dave r said:
Nathan, you might experiment with the OpenGL settings under Preferences. It might be that you'll find ticking or unticking the boxes another combination will give you better performance. Start by turning off Use Hardware Acceleration.
Dave, I just finished trying what you had suggested, yet nothing has served to alter the condition. I tried everything - within that 'OpenGL' settings area - but no change. Being that the program HAD run as smooth as it possibly could, and is problematic in that area now - especially after my not having changed any settings by which to cause it - I am left with the assumption that the causative factor has to lie within my computer, itself.
But I thank you, as always, for your input.
Nathan