"Maximum barline distance" for Chord Symbols

It's a bit confusing I agree. What is happening is that MuseScore tries to automatically add space to a measure as necessary so that chord symbols *within* the measure don't collide, but for various reasons, this system cannot currently work *across* measures. So if there is a chord symbol at the end of one measure, it can cross the barline and collide with the first chord symbol in the *next* measure.

The parameter in question controls what happens in cases where a chord symbol is potentially too long to fit within a measure. We will add padding as necessary *up to the amount specified in that parameter". So with that parameter set to 0sp, no space whatever is added:

That's fine since there is no chord at the beginning of the next bar, but would lead to a collision if a chord was present there. Since we cannot currently deal with this case automatically, we allow you to specify you want space added. A small amount is added by default as a hedge, so that "most" chord symbols will fit:

This won't be enough space for longer chord symbols however:

If this just happens occasionally in your score, you can adjust things manually. If you have a lot of this sort of thing, however, you might prefer we always allocate extra space. So you can turn up this parameter to say allocate space as necessary, up to this amount. So setting it to an outrageously high number like 100sp means, allocate as much is actually needed, up to a maximum of 100sp (which you will probably never hit):