How to draw 2D Windows and doors with cad

First open cad to enter the main interface, then REC space, draw a 100*1000 rectangular model for backup (window building)

Then X breaks up, breaking up the rectangle, as shown in the figure

Then DIV is used to divide the X-axis into thirds

Then use the L space to draw a line in the rectangle as shown

Then use the B space to turn the painted window into a block and edit it for backup, as shown in the figure

Then REC space first draw a 100*100 rectangle (door)

Use the X space to break up the rectangle

Then use space A, space E, space D to place the mouse on the vertex of the rectangle and press the left mouse button

Then select the remaining two unused lines and delete them, as shown in the figure

Use B Spaces to build blocks for backup

So the block model of the door and window can be used at any time according to the I space, is not very convenient