In a normal desktop the program or the desktop chooses a size for the window and pops it somewhere on the screen, but i’m using for my desktop something called a tilling window manager(sway in this case), which takes the program and tries to use as much of the screen as possible (or as i allow it), then when another program wants to open it resizes everything to give every program a nice amount of space without overlaping.

If you wanna know more i recommend searching on youtube “desktop enviroment vs window manager” and you should find a couple of videos explaining not just how i place the windows like that but also how it differs from what you might be using