Easy way to toggle through Arpeggiator presets?

I'd like to know as well. I don't use the arp patterns very often, primarily for this very reason. It takes forever to go through them and I always seem to find one that's close to what I"m looking for, but not quite there. I think that this is one area that could use some improvement in a future version of P5. Here's what I'd like to see:

1) some sort of pattern preview to expedite pattern searches;
2) MIDI note-based patterns that appear in the PRV when you select them (this could address my first request). In other words, you select a pattern and the pattern appears in the PRV with the root at C4, for example. You can then highlight the pattern and drag to the desired root note position. The pattern's almost there, but you have a Dsus chord in your song and the pattern is playing over a straight D triad - no problem, just grab the F# and drag it up a half-step. Adjust the gate - see the note lengths change, etc.; and
3) the ability to freely edit and save the newly created patterns.

In other words, the arp patterns would simply be a bunch of starting points that are designed to be easily customized. It seems to me that this would not be difficult to implement. Maybe this can already be done and I'm just too dumb to figure it out?

This is a major issue as far as workflow is concerned, IMO, and I think it really is crucial this be addressed in the next P5 "feature rich" update. The arp is indeed quite useful, but giving it smoother browsing and better "print to track" fucntionality would make it a real selling point. As it is now its almost6 useless to me.