Tick Mark
The TickMark 
is used to insert the tick marks of a timing ruler scale onto a lifeline.
To insert a TickMark:
1.Click the tick mark icon and click on the lifeline to insert it.
2.Insert multiple tick marks by holding down the Ctrl key and repeatedly clicking at different positions on the lifeline border.
3.Enter the tick mark label in the field provided for it. Drag tick marks to reposition them on the lifeline.
To evenly space tick marks on a lifeline:
1.Use the marquee, by dragging in the main window, to mark the individual tick marks.
2.Click the Space Across icon 
in the icon bar.
