musescore/MuseScore — pull request #189 by Isenbarth (2013-01-29 16:53:00+00:00)
Title: add update accidental mode

Adds functionality: When Accidentals are changed via the accidental palette or toolbar button while pressing the ALT key, the change will be valid for the rest of the measure (or until the next accidental is found) as needed when correcting scores (eg. those imported from an OCR program).