A video from Namm, but actually it was announced a little before NAMM..
KRONOS software version 3.1.0 adds a new Quick Layer/Split feature that lets you easily “layer” (overlay) another program with the selected program or combination, or create a “split” in which you place a different program in the higher or lower region of the keyboard. For more information, please see the updated PDF manuals and the onboard Help system.
In addition to these new features, the update includes various improvements and important resolutions to specific operational issues. For more information, please see the Release Notes.
We recommend that all KRONOS and KRONOS X users update to version 3.1.0. This update may be installed on any KRONOS, regardless of the currently installed system version; it is not necessary to install intermediate upgrades first.