Server project open while mobile app project open

I often bounce back and forth between the front end code and server actions–great if those are contained in the same project.

However now working on a mobile app, I would like to have a second project open on the server side so I can bounce back and forth in this work flow as well. Basically having the ability to open a server project separately from a front end project.

I realize I can change projects, but another step and does not allow for side by side comparisons