Hello , 

i was wondering that if change of resolution will result in the change of sensitivity even if the aspect ratio stays the same ? like going from 1440p to 1080p 

Only if the game is 2D (like osu) or if you change aspect ratio.

Changing resolution with the same aspect ratio does not make a difference.

Ok so I’m going from 1080p to 720p, image upscaling to fit the fullscreen, on apex legends? Although it doesn’t affect my sensitivity, I have 2 questions

does image upscaling affect fov?

why does my mouse movements on the loading hud menu feel faster and why is the FPS counter and cursor bigger?

 

9 hours ago, TempleRxse said:

Ok so I’m going from 1080p to 720p, image upscaling to fit the fullscreen, on apex legends? Although it doesn’t affect my sensitivity, I have 2 questions

does image upscaling affect fov?

why does my mouse movements on the loading hud menu feel faster and why is the FPS counter and cursor bigger?

 

Sensitivity is not affected, but mouse cursor movement is since it's directly tied to the resolution. Also when you lower resolution a lot of things like the cursor and FPS counter will appear bigger since they are displayed in a set pixel size.