Hi Anis,

> in the future, how about add one more button on the bottom
> toolbar or replace the "3D" ?

It's kind of tough to think about doing that by default - it is generally a big goal for MoI to stay easy to use and have an uncluttered interface...

The more types of specialized things that get added to the top level tends to create clutter and tends to create complexity and confusion among people who are not MCAD experts.

Maybe in the future I will be able to make some options that will let you configure MoI to have those buttons, but at least in the meantime those keyboard shortcuts should get the job done for now.

- Michael