To merge/intersect the time tables drag them from the Time Tables tree and drop onto the panel. The result time table is saved into your Workspace and is automatically loaded into the Time Table Manager.
The result name in case of two input tables:
Merge: timetable1_M_timetable2 || Intersect: timetable1_I_timetable2
In case of more than two input tables:
Merge: number-of-input-tts_Merge_[index] || Intersect: number-of-input-tts_Intersect_[index]