Data service tab
Data service tab displays a verbose info list of currently loaded data, corresponding to active Trace View component. Each row represents a trace. Each cell - a trace property. Some of the cells are editable - that is, you can double-click on them and change the value.
On that snapshot one of Phases cell is selected. But if immediate value change is not possible, you'll get extended info, just as in this example. You should then use another tool to modify this (Phase editor).