In Songtrix, Drum Segments are used for the Drums track.  Their segment sheets have the following drum events available.

While drum segment sheets have the standard layout and operations of all segment sheets, they also have special features.

Scope Axis

With drum segments, the lines are indicated on the vertical axis with labeled boxes.  Each box represents the drum sound that the events on the line will play.

The collection of drum sounds in the track (scope) can be changed using the Drum Kit page.  Depending on the Midi Output device, there may be preset kits available.