Race Technology

Is it possible to define ones own boolean variable that would be set when the engine is running, i.e. 0 when RPM < 500 and 1 when RPM >= 500 and then use that variable in controlling more than one output driver?

I could control each output driver I need with the actual RPM check as well as any other parameter (I think), but if I needed to change the RPM value used, I would need to adjust it in each output driver in which it was being used. However, if I could define a variable as above, then a single modification of that variable calculation would affect all instances of that variable in use.

Can I do this?

Apparently I can, but how does one define a new variable? I can see how to modify an existing one, but not how to create a new one.