Maybe this is asking too much, or again maybe it is easy and i just missed the instructions.
Sometimes while working on a project, in WinEdt, with a set Main File, I need to look at TeX files that do not belong in the project. So, I can open any such file and read it as a source file (and then close it again before saving the project). But so far as I know now, I cannot show its pdf while the project is open, since it is not included in the Main File of the project.
Is there a command that would show the pdf of a file not in the project without closing or changing the project? As Ulrike Fischer comments I could unset and then afterwards reset the main file. Or I can close the project and look at the pdf of the other file. But I often want to go back and forth a lot and that kills a lot of time. Is there a quicker way way to access the pdf of a file that is not included in the project?
Note this is opposite to the question Compiling multi-file LaTeX file since OP of that question did want to compile the project and not some other file.