A way to cycle between overlays with different resolutions

[NIGHTKILLER05]

Hi guys, thanks for reading me, I want to add the Orion Angel's Overlays to my mame games, but I have different bezels for the same game (and I love all of them!) , besides I want to implement the possibility of remove the Overlay while in game, I can do the first thing with the Retroarch's Hotkey named "Next Overlay", with that I can use several Overlays and cycle between them with hotkey enable+next overlay, I have this example file of my file at "/opt/retropie/configs/all/retroarch/overlay/overlays/aliens.cfg :

overlays = 3

overlay0_overlay = aliens.png
overlay0_full_screen = true
overlay0_descs = 0

overlay1_overlay = aliens_bak.png
overlay1_full_screen = true
overlay1_descs = 0

overlay2_overlay = full_screen.png
overlay2_full_screen = true
overlay2_descs = 0

This Realistic Arcade Overlay was made by: OrionsAngel

The thing is, the second overlay, "aliensbak_png" have a different size compared with "aliens.png", I need to change que image size/position for that overlay and I didn't find anything useful in the configuration files, I found that the resolution/position of the screen is saved at "/opt/retropie/configs/all/retroarch/config/MAME 2003-Plus/aliensu.cfg" (I saved this configuration per game basis) but that's all, besides when I choose the third (empty) overlay to remove the overlays would be nice if the system could reset the image size/position to the default values to show the game fullscreen without the overlays.

Help me please.