
Steps
Hover over the "Rectangle" icon in the toolbar.
Select "3-Point Center Rectangle" to Enter 3-Point Center Rectangle mode.
Create a 3-Point Center Rectangle:
Left-click to define the center point.
Move the cursor and click to define the midpoint of one rectangle edge.
Move the cursor and click to define the third point as a corner of the rectangle.
(Optional) Enter values and press Enter to apply constraints.
Right-click or press Esc to exit.
Step 1 - Hover over the "Rectangle" icon in the toolbar:

Step 2 - Select "3-Point Center Rectangle" to Enter 3-Point Center Rectangle mode:

Step 3 - Left-click to define the center point:

Step 4 - Move the cursor and click to define the midpoint of one rectangle edge:

Step 5 - Move the cursor and click to define the third point as a corner of the rectangle:
