How do I use 2 Fullscreen modes together?

Hi

Is it possible to use 2 full screen modes together? for example

I want to use letterbox scale and scale outer together in a way that at first the game uses letterbox and then uses scale.

is it possible?

No. It doesn't make sense to use 2 full screen together.

but it makes sense

for example I made my game based on the 960 640 resolution

when I play it in a device with 1080p resolution, at first the game uses letterbox scale and the game resolution become 1620 1080 , black bars will appear, now we use scale outer and remove the black bars.

Heska he is right it. What you want to do it just scale the layers. and if you need black bars just use a sprite

Heska You need change the game design, you have to code viewport to set UI elements position and use background main to set size according to monitor size, and last, make sure to enable Unbounded scrolling, that's all, you won't see black bars anymore, videogame is NOT video format, it's dynamic screen, even if you make window small, it runs very smooth and improve performance.