To add an angled wall using the free hand tool, follow the steps below:
1. In Plan view, go to Insert Catalogue Items.
2. Click on the Walls selector.
3. Select the type of wall you want.
4. Click on the Freehand Tool.
5. Use the snapping points to go from one wall and create your new wall.
In the example below, we are going from one wall and letting the angle be automatically calculated.
You can also set the angle when the Freehand Tool is selected and you click on the first snapping point.
Simply use the tab key to go to the angle and change it.