There Advance build doesn't fit in the windowed screen.

There it just appear in the middle of the screen.

Resize the game window will interfere with the ingame simulations size (entities size reduced, world, etc.). ==> OK, intended behaviour.
Partially with the ingame window menu (i.e navigation, faction, etc.). Menu will move to stay inside the screen but they won't resize themselves to keep the proportion of the game window resizement. Player will have to manually resize and place all different game menu when he'll resize the game window. ==> bit annoying
Absolutely not interfering with Advance build mode & instructions help. Depending resolutions the Adv build mode will be either too off-centered on the right or either in the middle of the window. The entity stat window ==> extremely annoying