Hi Claudio,
Since I had responded to your survey email, I forgot to respond here publicly as well
Here is part of that reply, just so other folks who may be wondering or asking some of the same things will have the response as well.
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For transposing pitches of notes, you can use Staff/Transpose Actual Pitches and change the key of a song.
When you save a .not file, and you have selected a Part from the drop list on the menu bar, then the next time you open the file that Part should be the one that displays on re-opening the file. Or perhaps I'm missing the point of your suggestion?
For the Part Wizard (eg. Fakebook lead sheet), we could possibly have a "Quick - accept all defaults", but the variety of .mid and .kar files that are available would make that an almost useless button for the majority of our users. It's very rare that accepting all the defaults for a file will give the best result all the time.
Regarding guitar chord diagrams, we do have plans for better guitar (and other stringed instrument) support, but that won't be til a later version.
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If I've missed anything, or you want to follow up on any points, please let me know.
ttfn,
Sherry