Does system layout scale work or are you looking for something else? I'm no artist so you might be looking for something specific.
Doesn't layout scale resize everything on the screen?
I must resize only the green part of the example picture I posted, let's call it the "screen" of the console.
Couldn't you get that effect from your image editor?
Create the controls with a higher res and the rest with a lower res, or soften them up a bit.
I don't know if C2 can do this. Accept for maybe adding an 'effect' behavior... Try adding the Sharpen effect and see if that suits your needs.
For now I'm drawing sprites low res, then I upscale them and put it in game directly in "HD" (I don't use Construct's built in resize feature because it makes them blurry). The problem is that, this way, the movement isn't congruent with the 160x160 look of the "screen".
For example, after I upscale my low res sprites every pixel becomes a 7x7 pixels square, so if something moves 1 pixel in the game, it moves an actual pixel not 7 pixels, and characters become misaligned to the game world and other sprites.