The debugger shortcuts are listed in VFP help under Debugger Keyboard Shortcuts and Menus. Here're a couple of them.

Step Into  F8
Step Over  F6

>I think I have some sort of brain lock.
>
>I have done this before, I can not find the way to run the next line in the debug window?
>
>I want to run one line at a time, not resume the program.