This button unfolds a level of lines: projects and phases. Only breaks will be visible, even though everything is folded. This button is accessible from the timesheet header line on the left.
Allows you to unfold a level on the board: fold the risks of a gravity, fold the gravities of a type of risk.
At the top of plan : Allows you to expand a level in the plan : expand the project phases, or expand the resource projects, for example. In the plan , at the resource level: Allows you to expand a level in the plan : expand the project phases, or expand the resource projects, for example.
This button is accessible from the header row of plan , on the left AND at the resource level using the chevron.
Unfold a level on the board: unfold project phases, or phase resources, for example.