How to set debug breakpoints

I am successfully single stepping with the debugger but my debug menu choice for set breakpoint is greyed out even when debugging. It is getting rather tedious to single step through a rather large script. SB 5.2 doc implies you can set a breakpoint but never specifies how.

How do I activate breakpoint?

Joe,

Breakpoints are not supported in 5.2 and will be available in a later release.

Thanks,

Yes, breakpoints(!) and the ability to change the PC (program counter) so that variables can be changed and the logic be re-executed w/o having to restart the script!