Boss GX-100 Parameter Manual page 138

WRITE
INSERT (Inserting a Memory)
You can insert a memory into any position of the user memories.
For example, if you insert memory U01-1 at U02-1, memory U02-1 and subsequent memories are shifted (renumbered) backward
by one. (Memory U02-1 becomes U02-2.)
When you execute the insert operation, the last user memory (U50-4) is deleted.
1. Press the [WRITE] button.
2. Touch <INSERT> (or press the [4] knob).
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