Custom images invisible in the palettes?
I have created some custom arrows using a suitable software (.jpeg or .png format) in order to place them in a custom palette.
With version 2, I see these arrows added - image below.
With version 3 (3.5), the process works the same way, except that these arrows are absolutely invisible in the palettes, and whatever the chosen size of the cell.
Did I forget something, or what's special now?