One last thing Toni I thought I might as well mention that's also related to display / filters / masks.
On the "Filters" tab, under "Extra Settings" I set "Scanline opacity" to be "50". This is a great feature as I get my beloved scanlines but it's not too dark to spoil the colour / brightness of the display
One small issue I've noticed though is if I swap from "Fullscreen" to "Windowed" (or vice-versa) then the above disappears as if nothing has been set...
To get them back on I need to press <F12>, go to "Filters" tab, then adjust the level by any amount and click OK.
Would be very cool if this was reapplied when swapping between "Fullscreen" and "Windowed" modes.