Much better thanks. I still have latency with the "Create room" feature. Here is what happens:
1. Put the mouse cursor on a corner and wait for the inference engine to display the small blue disk
2. Then click
3. Move to another corner and ...(step 1)
4. Click
5. Move the...
-> At that time, there is a big chance the point created at step 4 is not where the inference disk was. As a result, when your room is defined, you have to refine the positions of the points which are not located where they should be.