Interior windows+room size

[atrop]

Hi
2 things that makes my life harder ...
Any chance i can swap the window to be interior so if i was having a 30cm wall i want the glass to be in a straight line with the interior wall.

When asking to show "room label" in the room properties i am getting the size like it was a straight square - something like 200x300... don't see any reason why i need this 2 numbers and how it closely should help me understanding my room behavior, for example if my rooms shape was pentagon....
Its why i prefer to get the total room size (without walls) in one number after all the calculations.

Thanks in addition

[dshall]

How many inches is 30 cm? Are you in USA or somewhere else?

[atrop]

1 inch = 2.54 centimeters
from europe

[stecha51]

If your frame depth is 100 mm
set the inset depth to 200mm
this is what I do
god luck

[atrop]

thank you very much great solution...

Any idea about the room size parameters?
* i would be glad understanding why CA uses this kind of sizing to express the room parameters as well - if anyone can actually explain that ))