Hello, to design an arc-shaped doorway, Method 1: You can directly select the arc-shaped doorway from the library, place it on the wall for opening, and the screenshot is as follows:

If there is a faceted situation when placing the wall, click to rotate the direction of the doorway in 2D. 

Method 2: You can also use the function of free modeling to create a special-shaped arc-shaped door opening. The operation animation is as follows:

Method 3: In the new design version, the door opening can be directly edited into an arc-shaped doorway. The specific operation steps are as follows:

1. Drag and place the Doorway;

2. Switch to 3D/roaming state;

3. Press and hold the Ctrl key and left-click on any surface of the Doorway;

4. When the doorway is in the selected state, adjust the parameters in the pop-up property panel.