To open the Measure dialog, select Format→Style...→Measure.
This allows you to adjust the distance between various items within measures.
If you change a measure style property, MuseScore automatically adjusts the score to maintain the correct spacing between notes and rests according to best music engraving practice. It will also correctly reposition any elements attached to notes or rests, such as fingerings, dynamics, lines etc.
All settings related to measure width and note spacing are minimum values. Measures are automatically stretched, if necessary, to maintain existing page margins.
All the properties listed below use the staff space (abbreviated to "sp") as the basic unit of measurement. See Page settings: Scaling for more details.
Minimum measure width: Sets the minimum horizontal length of measures. In measures containing very little content (e.g., a single whole note or whole measure rest), the measure will only shrink as far as this minimum.
Spacing (1=tight): Condenses or expands the space after notes or rests. This setting thus affects not only space between notes but also between the last note and the ending barline. For the space between the beginning of the measure and the first note or rest, see Note left margin (below).
Note left margin: Sets the distance from the start barline to the first note.
Barline to grace note distance: Sets the distance between a barline and a grace note that occurs before the first actual note in a measure (independently of the "Note left margin" setting).
Barline to accidental distance: Sets the distance between a barline and an accidental placed before the first note in a measure (independently of the "Note left margin" setting).
Note to barline distance: Sets the distance from the last note to the following barline.
Minimum note distance: Specifies the smallest amount of space MuseScore will allow after each note (depending on other factors, more space may be allowed).
Clef left margin: Sets the distance between the very beginning of each line and the clef. (This option is rarely needed.)
Key signature left margin: Sets the distance between the beginning of the measure and a key signature.
Time signature left margin: Sets the distance between the beginning of the measure and a time signature (if there is no time signature in between).
Time signature to barline distance: To be added
Clef/key right margin: Sets the distance between the material at the beginning of each line (such as the clef and key signature) and the first note or rest of the first measure on the line. (Note that, although not named in the option, if a time signature is present, it is the element from which the spacing begins.)
Clef to barline distance: Sets the distance between a barline and a clef change preceding it.
Clef to key distance: Sets the distance from the clef to a key signanture following it.
Clef to time signature distance: Sets the distance from the clef to the time signature following it (if there is no key signature in between).
Key to time signature distance: Sets the distance from a key signature to the following time signature.
Key to barline distance: To be added..
System header distance: To be added ...
System header with time signature distance: To be added ..
Multimeasure rest margin: Sets the distance between a multi-measure rest and the barlines on either side.
Staff line thickness: Sets the thickness of the lines of the staff, which allows you to make the staff thicker and darker, if you need greater visibility on your printouts.
Note: Changes to an individual measure's Stretch (using Format→Stretch → Increase/Decrease Layout Stretch) are calculated after, and proportional to, the global Spacing setting.