Hi Didier, if you get the views set up how you want them you can then save a 3DM file, and then use that 3DM file as the startup template. Then your initial view setup (and various other things like default Styles too) will come from that file.

You can set the startup template under Options > General > "Template file".

It doesn't really matter where you put the template file, just save it in some place where you won't likely delete it later on.

- Michael