1. Left click on the wall, and the pop-up interface can adjust the thickness and length of the wall. The default height of the wall is 2.80m, which can only be adjusted if a low wall is set.

2. You can adjust the value by clicking the small triangle or the inverted triangle, or you can enter a number and press Enter.

3. The wall length can also be left-clicked to select the wall, and then click the points at both ends to drag and adjust.