MuseScore

What's new in this version:

Playback:
- Support for partial ties at repeats and jumps
- Support for arpeggios with swing rhythm
- Fixed regressions in tie and portamento playback in repeated sections
- Fixed regression where clicking the same measure would not return playback to the start of that measure
- Fixed regression where jumps would be taken multiple times when system markings are enabled on multiple staves

Engraving:
- Improved slur layout across large time signatures
- Chord symbols no longer collide with each other horizontally or vertically
- Beat anchor visualizations (blue stripes) are no longer shown in printed or exported scores
- Voltas and rehearsal marks only anchor to barlines, not to beat positions within a measure
- Large time signatures added in the score no longer appear large in the parts (unless the large style is also enabled in the parts)
- Length of 4-measure repeat extender lines is now calculated correctly
- Time signatures changes at repeats are indicated after the barline when opening pre-4.5 scores
- Visibility property of courtesy time and key signatures is preserved on saving and loading scores
- Fixed creation of partial ties across repeats and jumps, and improved performance
- Incoming partial slurs can now be created from clefs, time or key signatures to the first note of a system
- Fixed regression creating incoming partial slurs from an end-repeat barline to a subsequent note
- Fixed regression where empty lines added to header or footer text in Format > Style were not rendered on the page
- Fixed regression where brass/woodwind falls collided with augmentation dots
- Fixed regression where string data was missing for the Bass Viol (tablature) instrument (PR #27380)

Guitar:
- Fixed regression where fretboard diagrams were undesirably modified to reflect changes made to chord symbol attached to the same note
- Fixed regression where fret conflicts in were highlighted red in printed/exported tablature rather than in MuseScore Studio
- Fixed regression where staff lines were not masked by fret numbers in the tablature staff settings dialog and continuous view
- Fixed regression in the ability to extend barlines between linked and unlinked staves

UI:
- More detailed action descriptions are displayed in the History panel (PR #27236)
- Help > Online handbook now points to the new Handbook hosted in GitBook
- Percussion panel will start docked rather than undocked after updating from a pre-4.5 version
- Units like 'px' (pixels), 'mm' (millimetres), 'in' (inches) have been made translatable
- Fixed regression where range selection rectangle was drawn in the wrong place when hidden staves are present
- Fixed regression where undoing hiding of an instrument would not cause the eye icon to 'reopen' in the Layout panel
- Various other small UI tweaks in the Transpose

Interaction:
- System markings (e.g. tempos, voltas, rehearsal marks) are no longer duplicated when a time signature is changed
- System markings are always added to an instrument's topmost staff when pasted (affects grand/multi-stave instruments)
- Turning off multi-measure rests, or making a hidden staff visible, now unlocks systems that contained multi-measure rests
- Text elements follow the mouse cursor more closely when dragged across staves and systems
- Accidentals are retained when changing the duration of notes after leaving input by duration mode
- The Percussion panel no longer allows navigation keys or numbers to be used in pad shortcuts
- Fixed regression where hiding a staff's voice in the Layout panel would remove the staff from the Layout panel altogether
- Fixed regression where fingerings couldn't be nudged (i.e. moved) with the cursor keys immediately after being entered
- Fixed regression where pressing Return on a text marking would create a system break instead of entering text edit mode
- Fixed regression where accidentals attached to notes in the same chord could not be re-ordered horizontally
- Fixed regression in ability to create ties across a 'gap' (i.e. between non-consecutive notes)
- Fixed regression where right click > Select > Similar in range was unable to select spanner elements such as slurs
- Fixed regression where right click > Select > More referred to the first element in the range rather than the right-clicked element
- Fixed regression where switching from one VSTi to another wouldn't close the first VSTi's window
- Fixed regression where resetting all preferences would not reset changes made in the same visit to the Preferences dialog
- Fixed regression where the hyphen-minus (-) key didn't work for lyrics entry with non-English keyboards on Windows (issue still present on macOS)

Stability:
- Fixed crash on dragging the first measure of a score and dropping it back in its original position
- Fixed crash when adding instrument change text from the More popup in the palettes
- Fixed crash adding tie to a selected range that contains two non-consecutive notes of the same pitch
- Fixed crash when exchanging partially-tied notes between voices within a repeated section
- Fixed crash when splitting a measure near a lyrics line and the end of a system
- Fixed crash when closing a score after deleting a measure with partial ties
- Fixed crash after clearing a measure (i.e. deleting its contents) and then undoing (e.g. with Ctrl+Z)
- Fixed crash when opening the Layout panel while an empty system text element is present (and disabled creation of such elements)
- Fixed crash when pasting in continuous view after copying and exchanging notes between voices in normal view
- Fixed crash when accessing the Mixer's three-dots menu > View > Restore the default layout on macOS
- Fixed crash on pasting multi-voice passage in continuous view
- Fixed crash when dragging a note-anchored line (found in the Lines palette; once entered, it's no longer possible to drag these lines)
- Fixed crash and disappearing clef triggered when hidden staves are present in the Layout panel
- Fixed regression in performance when pasting spanner elements (e.g. lines, hairpins, slurs, etc.)

Accessibility:
- Fixed regression where screen readers wouldn't announce the name and first item of a menu (e.g. "File, New") as it was opened
- Fixed regression in keyboard control over the anacrusis / pickup measure dropdown in the New Score dialog
- Fixed regression in 6-key braille input where it was not possible to type interval signs to create chords