I want to make a class blue print with a floor that is 300x300x20 but in the architecture is only 400x400. How can i make this floor 300x300 or how can i make a new one that is 300x300. I am new to the program so explain to me like im a baby.
With your blueprint open, click Components in the upper right corner. You see your floor right? Either find the X/Y/Z values and change them, or manually grab and resize your floor.