F1 help for BarZone does not point directly to BarZone.

Instead keywords there are:

BarPeriod

BarOffset

TimeFrame

FrameOffset

it is actually showing this page:

https://zorro-project.com/manual/en/barperiod.htm

but in any case, maybe there should be at least a link to

https://manual.zorro-project.com/assetzone.htm