Automatic transposing of chord symbols to guitar schemes

"Most people" means most people, not most good guitarists. Not every one can afford a teacher and a nice guitar. Your average guitarist isn't gonna be an expert that can barre everything on the fly like that. At any rate, I was exaggerating a little. I don't know what level of guitar the OP is writing for but I assumed it was nothing too technical or anything like that. There was no reason for you to personally doubt or attack me and my "play level" because I was trying to offer helpful advice to someone. That was rude and juvenile, and does nothing to help the OP. Obviously barring is a common technique but especially when transposing, you should use a capo. because a capo is nothing but a transposition device. Barring can change the voicing of chords, because there are so many ways to do it.

I was exaggerating when I said those four chords are half of guitar music, but seriously, it's pretty close. If you look at chord charts for most popular music. Obviously I'm not referring to classical guitar or anything like that, but most guitar music is written for a regular steel string or an electric. Those four chords are the first things anyone ever learns on guitar, and obviously should be included because they are VERY common in genres of music that frequently use guitar such as bluegrass, indy, folk, worship music, rock, etc. If you head to a guitar store and buy a book on guitar, chances are those are gonna be the first four chords in the book.

At any rate, the guitar is one of the most versatile instruments in the world and has many diverse playstyles. A classical guitarist may be able to make a concert hall weep while he plays a Brahms masterpeice, but he would be pretty confused if you hand him a Schecter tuned to drop Bb. And the best blues guitarist in the world would have trouble adjusting to the classical guitar.
Some of us can play any style, on many different types of guitar. Some of us are more focussed on one style.

Either way, there are a few things that most guitar music has in common, and I think the four chords are present in a very large amount of guitar music, and thus should be included in the palletes. One of them already is. And when the OP discussed the transposition, he specifically mention the open position chords near the nut. Those four chords (and a few others).

"I'm just talking about the basic "standard" mayor, minor, seventh, augm and dim schemes to the 12 possible pitches. I'm talking about the symbols that use just the 4 first spaces (lower part) of the standard guitar. Just that."

The twelve tones of the chromatic scale can't be done without a lot of barring and some of them might be higher than four frets (I think, I'd have to try it out), especially adding in augmented and diminished chords, but at any rate, I think that's what most people who play a standard-tuned, steel-string acoustic guitar in a chordal fashion would want.

Not classical, not jazz, not R&B, not deathmetal, just standard steel string using the most basic chords that anyone can play, regardless of experience level. Obviously it would be very difficult to write every voicing of every chord in every tuning for every style. Especially jazz with all its ninth chords and such. I have a 200 page book of chord charts that covers only four ways to play each chord in standard tuning. But at any rate, the OP just wanted to keep it simple and transpose to whatever is easiest to play-- the open position chords.

I'm not talking about alternate tunings. I'm just talking about what chords, and what voicing of what chords, are commonly used. "C" might be a common chord in almost any genre, but I can assure you, it is *not* common in many genres to play it the way it shows in the palette. It's pretty much only common in folk-based music, including folk rock / pop.

But again, my point is, I am not oppsoed to adding a few common / beginner chords to the palette. But in order to be useful, a transposition facility would have to be able to deal with any chords, not just the few simple ones it has been preprogrammed to understand, and I'm saying that is just not feasible. We can transpoe chord *symbols* because all we really need to do is transpose the root, not figure out exactly how to voice it in another key.

if you are using 2.0, that shouldn't happen, unless maybe the score is imported from 1.3 and is using one of the old-style 1.3 "chord description files" that expects a different abbreviation for minor rather than the new 2.0 system. A score created from scratch won't do that, but certain 1.3 scores might if they are expecting "mi" or "min" or "-" because of the settings they were created with in 1.3.