How to map midi buttons to rack spaces

i’m a new user of GP and i’m very much satisfied for the features offered.but,to perform live how should i change my rackspaces using my midi controller buttons in novation launchkey 49. if any one knows how to do pls do reply me

@kishore, welcome to the GP community. The settings you seek are accessed via Options–>Global Midi Settings. You’ll see you can assign midi controller to the “Prev Rackspace” and “Next Rackspace” items in the third section on this config page.

I personally don’t use these settings as the only time I really want to use a controller to go next or previous is in setlist mode. Those can be set in the Options–>Setlist config.