Transpose for midi...

[Spadehead]

This would be useful when you've already got a sequence and want to quickly transpose up/down by semitones and octave.

[shankiphonic]

Multiple times I’ve wished for this after realizing I put a sequence in the “wrong” octave.

[denizgarout]

+1 for this

[Zapman]

If you want a good sequencer, buy an RS7000
The Blackbox has it's strengths, but it's still missing many things, like this.

[arteom]

not only up and down but also left and right. would especially be useful for fine adjustments with step mode off.