Is it possible to delete a group of objects at once vs. deleting them one at a time?
Yes. To delete any given User objects (song, program, setup, etc):
Note: much like the STORE menu in Storage mode, this Object menu offers a variety of selection tools, from selecting things by numeric bank, object type and so forth. This tutorial and above example are specifically detailing the 'Advance' selection tool. Please see chpt 11 in the PC3/K v2 Musician's Guide for discussions on the other selection methods available.
CAUTION: Deleted items cannot be retrieved once erased. As needed, be sure to save any desired custom items externally before deleting!
A brief message confirming the items were deleted will be displayed. Press Exit several times to return to the Program mode and normal operation.
Need more info? Check out the following links: