Alt+enter

You're right, I tested a bit between the Fit, Fill and Factor and somehow Fill looks better than Fit.
It mind ♥♥♥♥♥ me a bit to see the whole screen to be honest but i'll get used to it.

SharpBilinear prescales the image to a desired integer scale (type factor sets the scale factor relative to the input image) using the nearest neighbour sampling algorithm (in this case known as Integer Scale 2x in Magpie) and then applies bilinear scaling after the first pass to fill in the rest of the fractional scale factor.

Note: Gamma status doesn't matter in this case, so you won't have to readjust with ImageAdjustment.

Also setting the type to fit introduces blurriness and/or non-uniform scaling cause of the stretching, the initial scaling should always be factor since RPGMaker VX Ace window size is not a 1:1 factor.

If you wanna do some in-game comparisons, pick the knight skin and look at the inner edges of the helmet, comparing them to Integer Scale 2x (NN), MMPX and SharpBilinear to spot the difference in pixel sharpness and blurriness.

Also, how is SharpBillinear compared to Integer Scale x2, thats what I was using this whole time for RPGMaker games.

I just figured I was using Magpie the wrong way the whole time with this, wtf, thanks i guess.
If you don't like how bad it looks from Fill mode, and don't like the black bars top and down of the screen, you can use the "Fit" when selecting the type instead of "Factor".
I think its the best of both worlds.

Very good guide easy to understand, so I would even say it is idiot approved

Just in case anyone is wondering, if your game window is named: "Black Souls || #U"
then that means you still need to get the patch for the full game or you didn't apply it correctly.

Can you also make a guide about how to open game with steam overlay?

No problem

Thanks for the guide! really appreciated

If anyone knows the creator of the Leaf gif I used for the thumbnail let me know, I wish to credit them!