How to draw a room accurately?

In the "Create Room" catalog, in "Draw Walls" section you will find three ways to draw. Select the "By Center" tool in "Draw Walls", then click the left mouse button on the canvas to draw. You can enter the length values of walls or drag walls to adjust the room. When using "By Center", the cursor will indicate the centerline of the wall. When using "By Edge", the cursor will indicate the inner line of the wall. Use "Draw Rooms" can draw enclosed rooms directly.