You can move a door by clicking and dragging it inside the wall, or by editing the dynamic dimensions on either side of the door.
To move a door by clicking and dragging:
Click on the door to select it.
Click and drag the door to move it, then release your mouse button
To move a door by editing dimensions:
Click on the door. Dimensions appear on either side of the door.
Click on the dimension you want to edit.
In the Edit Dimension dialog, enter the new value, then press Enter or click OK. The door position updates automatically.