How you can check an angle across the diagonal of the room or the partial diagonal.
Step 1: Choose Check angle.
Step 2: Select the angle to be checked in the ground plan.
Step 3: Measure the appropriate diagonal between the walls where the angle lies. You can also measure the partial diagonal if the diagonal cannot be measured.
Step 4: Enter the maximum value of the diagonal manually in the Diagonal field and the new angle value will be calculated automatically.
Step 5: Click OK to finish the command