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Lead is the amount of time by which a successor task can be advanced with regard to its predecessor. So lead is a kind of negative lag.

It is possible to set a delay (gap) between tasks by moving successor task after the predecessor via drag & drop, or by editing task start date. But autoscheduling might eventually move successor right after the end of predecessor. Additionally, critical path visualization isn’t working correctly if there is a gap between tasks that is not set up as a lag of the dependency.

There are few ways to set lead or lag for a dependency, once you hover over it:

  • double click the link

  • right click a link, and select Edit from the context menu

  • double click the round task connector