It looks like the 'Clean Wall & Beam Intersections' option is on because your other walls are intersecting.
Just extend the cupboard wall to the outside corner.
If the wall reference lines touch, the wall will clean up as expected.
As for the dimensions, if you want 1580mm, then model the walls to be 1580mm.
You can change the units of measurement and the decimal precision that is display, but you can not round up or down.
You are dimensioning in millimeters which means you can show the actual millimeters (1575) or up to one decimal place (1575.0).
You could change the dimension units to centimeters, but then it will display as 158 with no decimal places or 157.5 with one decimal place.
Barry.
One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11
