By selecting Edit > Reorder traces by..., you can reorder trace lines in the following ways:
Precedence
This option reorders trace lines according to precedence relationships with the selected
event (which is highlighted green by default). Traces containing events with a precedence
relationship are moved nearer to the selected event, while those with no relationship are
pushed farther away. Only events currently visible are considered.
(You can also show precedence relationships by pressing Ctrl, while clicking an event.)
Local optimization
This option reorders traces to minimize the length of the arrows that connect binary event
pairs (such as between a call and a received call.) Local optimization is useful when the
trace appears cluttered with arrows. This option considers only currently visible events.
Original order
This option returns traces to their original order (the order that was in place before you
selected an Edit > Reorder traces by... option).
Move trace
You can also reorder trace lines by moving an individual line to any point in the
trace. For example, you may want to position a pair of client and object traces side by
side. To move a trace, follow these steps: