"screen" beginners

by its definition, I think I have understood that the screen is identical to the display in its size. On the screens I can do animations and fade outs of the various operational screens… my problem is that I would like to divide the screen into two distinct sections, let’s say a 1280x480 divide it in two logical units that follow two distinct logical paths and 640x480 screen on a single 128x480 hardware, is there a way to do this, would it require a subscreen concept?

I think there should be no need for sub-screens. You can directly create two objects with sizes of 640x480 and 128x480. The two objects can achieve their own independent animation effects.