When tapping the [keyb]-button, an on-screen keyboard appears for live playing:

[  up  ] [ down ] [ left ] [ rght ] [ sseq ] [ mtrx ] [ song ] [ scen ] ( bpm  ) 
[  -   ] [  V1  ] [  V2  ] [  V3  ] [  V4  ] [  V5  ] [  V6  ] [  +   ] [ shft ]    // velocity bar
[      ] [      ] [      ] [      ] [      ] [      ] [ sens ] [ quan ] [ copy ]    
[      ] [  C#3 ] [  D#3 ] [      ] [  F#3 ] [  G#3 ] [  A#3 ] [      ] [ pste ]    
[  C3  ] [  D3  ] [  E3  ] [  F3  ] [  G3  ] [  A3  ] [  B3  ] [  C4  ] [ undo ]    // base octave + 1
[      ] [  C#2 ] [  D#2 ] [      ] [  F#2 ] [  G#2 ] [  A#2 ] [      ] [      ]    
[  C2  ] [  D2  ] [  E2  ] [  F2  ] [  G2  ] [  A2  ] [  B2  ] [  C3  ] [ keyb ]    // base octave
[      ] [  C#1 ] [  D#1 ] [      ] [  F#1 ] [  G#1 ] [  A#1 ] [      ] [ fill ] 
[  C1  ] [  D1  ] [  E1  ] [  F1  ] [  G1  ] [  A1  ] [  B1  ] [  C2  ] [ trns ]    // base octave - 1

There are 3 octaves simultaniously available; the middle one will be the base octave, decided by the default note configured for this track. The [up] and [down] button allow you to shift in octaves.

The [V1] to [V6] button can be used to set a different velocity. The default value will be the velocity set for the default note for this track.

If you're using a touch-sensitive Midi controller (like the LaunchPad X for example), you can enable / disable touch sensitivity with the [sens]-button. When enabled, the velocity bar acts like a sensitivity modifier: lowering it will make the buttons less touch-sensitive, so you need to press them harder; raising it decreases the sensitivity.

Tapping the [keyb]-button twice will enable recording mode. The [quan] button can be used to enable/disable quantization while recording.

The bottom row (base octave - 1) will also double as a progress bar to give an indication on how far the current pattern is with playing. This will help when you want to start recording on the beginning of a track.

Undo

Any time you put the keyboard in recording mode, the current steps of the track is stored in the "undo"-buffer. So if you're not happy with you recording, you can simply tap [undo] to restore the steps of the track.

Just as with the track editor, holding the [undo]-button will save the current steps of the track in the "undo"-buffer. So this mechanic will allow you to undo your previous recording, even if you don't switch between live and recording mode.