Ok, ihave a tried this but don't know what am I doing wrong. When it takes me back to assembly and I move the part I want, and check ok. It takes me back to drawing but it just shows the assembly as I left it. And it moves the part in all configurations into that position. No dashed lines for alternate position. Same result as I go manually back to assembly and move it.

edit: 

Now that I made a mate (30 percent angle) in alternate position configuration and supressed it from default configuration it works as intented .