This layout is a remote control for Wavelab Pro
How to define your own customized shortcuts for a particular function in Wavelab.
• To open the Shortcut Definitions dialog, select File > Preferences > Shortcuts, select a command, and click Edit Shortcut.
MIDI Event Sequence -- This section is only available if a MIDI input port is specified in the main preferences in WaveLab Pro.
1st Event -- Lets you select the first MIDI event of a sequence that can consist of up to four MIDI events. Set the focus to the event field, then trigger the MIDI event from your MIDI controller.
Clear -- Erases all MIDI event fields.
Take a look at the PDF file to midi learn the layout.