Hello, wall niches can be created by selecting pre-made models or by using Free Modeling. In the 5plus version, you can also drag and drop in the floor plan – Structure – Niche. The specific operation steps are as follows:

Method 1:

Select from Cloud Materials – Decoration – Interior – Wall Decoration – Wall Niche.

           

Method 2:

You can create holes using the Top and Wall functions or Free Modeling. The specific steps are as follows:

     

Method 3:

In the 5plus version, drag and drop into the Floor Plan – Structure – Niche.

       

If you need to select a niche in 3D view, you can hold Ctrl and left-click on the niche, then adjust it in the parameter panel on the right.

You can also ungroup the niche and adjust the elements separately.

         

The operation is performed as follows: