Ive noticed strange behaviour: when creating an opening /eg door/
I need to declare a height because a door is window height by default.
And if I dont type units /eg CM/ after a number - I get height in milimeters
and not the units have been set in PREFERENCES ??.
In other words: I always set CM units in Preferences.
By default a door is window height. /100cm?/
Typing '200' makes a 200mm door height,
I need to add 'CM' after that number to obtain correct door.