Variable WBS Summary Gantt Chart

 -    (minus) in front of the SWBS (See A1) indicates that that summary WBS is expanded. 

 +    (plus) (See A5) indicates that that detail is summarized.

Lines with neither a - nor +  are detail level tasks.

To contract or expand a summary line, simply left click on that WBS.

When printing  (File|Print), these on screen choices apply.