Drum kits once loaded to a drum deck, will display a blank waveform initially, with drum shots loaded to each of the coloured pads. Click on a pad to see that pads drum sample, and it's waveform representation. Much like the Sample deck, the pads and their corresponding sample will show different colours that represent the frequencies most dominant, in that part of the audio. Red colours are used for sounds with low-frequency content and lighter colours are used for sounds with higher frequency content 

Main waveform: A large waveform that will show the Drum sample loaded to the corresponding pad, with the playhead at its centre. Cue points are illustrated by small coloured flags which match the majority frequency of the audio content they are placed upon.
Use the + or - buttons on your keyboard to zoom in and out of the waveform, or use the scroll wheel on your mouse.

Playhead: The white vertical marker that appears directly in the centre of the Main waveform, which illustrates the current playback position, and moves through the waveform as the source file is played.

Cue: Cues are coloured markers placed in the audio waveform, which assign playback positions for the coloured pads. You can trigger Cues by clicking on their corresponding pads with your mouse or trackpad, by triggering MIDI notes, or using your computer keyboard. Cues can be made up of a start point, an endpoint, and the region between these two points.

Cue start: Near the top of each Cue, is a small handle, or flag that illustrates the start point of a Cue. Click & drag on the Cue start point, in the Main waveform, to move the Cue point to different parts of the source file.

Cue end: Near the bottom of each Cue, is a small handle, or flag, that illustrates the endpoint of a Cue. By default, Cue points will automatically place the Cue endpoint on the same position in the waveform as the Cue start - these Cues will play until the end of the source file when triggered.  Click & drag on the Cue endpoint, in the Main waveform, to specify a place for Cue to stop playing - this will also create a Cue region.

Cue region: The space between a Cue start point and Cue endpoint, is illustrated by a shaded area matching the colour of the Cue itself, and also indicates the length of a triggered Cue point.