I found a new project, and i want to work in it, in addition to the current one, is it possible ?. if yes, how ?

I found a new project, and i want to work in it, in addition to the current one, is it possible ?. if yes, how ?
I’m not sure if I undestood. you just need to double click on that second project, open the document(s) on it, and work on them. Note that the Editor has multiple tabs and you can activate any one of them to work on (2 tabs in the screen shot below, only one active to work on):