How can I round all corners of a polygon? It is not shown in the video. In my case it seems only possible by using the Numeric field window?
It seems I am not able to use the mouse for more tools, like extrude length etc?

I found the answer, you have to hold the shift key, can't recall though that this is mentioned anywhere ....
Should have been made clear in the demo videos imho

Hi, It's in the LW-Cad Manual, It's under Smart Selection. You can find it using the links below.

https://sites.google.com/site/wtools3d/lwcad-5-0/2-basics/smart-selection

link above bottom of the page:

Adjusting all selected handles is done by holding SHIFT key. But only handles with parameters can be adjusted. Each handle with parameters can also be adjusted individually.

The video at the top of this page also talks about holding the shift key, Go to the 4 min mark of the video below.

https://www.youtube.com/watch?v=HZBinS5QLaE

These edge selections can be used on many tools not just the round tool. Here are some other links you might want to check out.

https://sites.google.com/site/wtools3d/lwcad-5-0/3-tools/3-edit/2-smart-edit

https://sites.google.com/site/wtools3d/lwcad-5-0/2-basics/smart-selection/1-edge-selection

Hope this helps

Thanks,
Jason