BOINC is running 2 projects at a time, how do I stop?

[xXCrossfireXx]

I just downloaded BOINC, great app, it's great that I can use my computer for research on issues.

So I added 2 projects, and started working on both of them. The thing is though, when I start running the commands for the projects, it runs both at the same time. The thing is though, I'd rather have one running at a time and getting it done faster rather than having 2 run at a time. How do I set this in BOINC manager?

 

[xXCrossfireXx]

Whoops, just solved problem by going into advanced view mode, requesting lock