Top panel – KORG app Help Center

Display :
This shows information such as the name of the selected pattern and the parameter values. Tap the display to open the pattern browser.
Dial :
Use this to select patterns. If the tempo is shown in the display, the dial will change the tempo.
BEAT(beat LED) :
This will blink to indicate each the four beats of each measure.
MASTER VOL (master volume) :
This adjusts the volume that's coming from the headphones and speaker.
Common section :
Here you can access the pattern browser, save patterns, change the tempo, access the settings panel, and access Utility mode.
Control section :
Here you can play/stop/record the pattern, and solo/mute each part.
Synth section :
Here you can edit the synthesizer parameters.
Effect section :
Here you can edit the effect parameters.
Part section :
Here you can make each part produce sound, select the part whose sound you want to edit, or select the part whose rhythm pattern you want to edit.
Step section :
Here you can change the range of steps that are displayed, or edit the rhythm pattern.