Quickly turn on/off settings using keyboard shortcut, or place the focus using Up and Down arro keys, and press Space to change switch position.
Read Views chapter in Harmony Assistant manual.

• Edit: access to standard Edit Title, Composer and Remarks (from File menu).
• On first page: switch to display/hide on first page (printing options).
• 3 sub-menus for each text to change font, alignment and fine positioning,
• Then 3 actions to change author's email, website, and music album title.

A way to change printing options from File menu. Note that a few options have no switch there, moved elsewhere or omited.

• Edit page setup: same as File > Printing options
• orientation
  • Orientation: default, portrait and landscape orientation is view-specific.
  • Paper area: only one paper area for all views. If you need different paper areas, work on copy of the file.
• Margins: a sub-menu to fine adjust margins:
  • Load & Save margins presets: save and apply a preset of margin settings
  • Top and left margins: both at the same time using 2D plotter with real-time changes on the score,
  • Right and bottom margins: idem,
  • Invert odd/even pages margins: switch
  • First staff left and top offset: also with the 2D plotter and real-time changes.
• 2 submenus Header and Footer:
  • Edit: as in File > Printing options
  • and all individual settings of this dialog: texts, fonts, margins, lines...
    You may think it's a bit repetitive, but you have real-time score changes, and this is compatible with batch processing.
• Load & Save systems setup preset: save and apply a preset of settings to staves and systems.
  Doesn't include margins, headers and footers. Includes settings below: justification, empty staves, multi-rests and multi-repeats...
• Justify bars and staves: bars, bars of last system, systems on the pages, system of last page.
• Empty staves: print empty staves on first system, on next systems, print empty systems.
• and some switches for frequently used options, like 'allow multi-rest bars' you may switch often if you have to fixe something inside multi-rest, force a bar to display, etc.

Score appearance settings are in Score > Display setup menu. Here you can adjust line thickness, accidental spacing, tie appearance, etc.
Harmony Assistant only allow you to save your settings as default for future new documents. It lacks a feature to save/load settings after document creation, and for various works.
Here is how I work:

• Write and edit music in general view, scroll mode: I need confortable settings for screen, especially line thickness.
• Views for individual parts: nice appearance settings for printing, for ease-of-read by musicians.
• A view (or a copy of the file) for conductor: a view where staves are smaller than individual parts, and score appearance adjusted.

That's why I added load and save settings features. Enjoy!

Your score may contain staves for transposing instruments (clarinet, trumpet).
Individual parts are printed transposed, and generally the conductor too.
Now, if one of your trumpet players say he or she will play on C-trumpet, you have to cancel the transposition to print a specific individual part in concert pitch.
No need to change staff transposition, no need to transpose from the Score menu, the magic option is isolated in... Options menu. I don't know why it's not in Printing options... So here it is. Switch ON before printing for C-trumpet player, and switch it OFF for other trumpet players. Don't forget to write somewhere that the part is for C or B♭ trumpet to avoid confusion.

• Import free objects from another score
• Insert & Delete reserved pages: insert/remove reserved pages, pages before the score.
  If the document has free objects, they are moved to stay on the page as before insertion/deletion.
  Reserved pages are for free objects. When a page is deleted, it's free objects are also deleted.
• Import free objects from another file
• Edit free objects: as in Edit > Free objects

Settings for group name visibility, position and staves join mode.
If selected staves are not in group (brace or bracket), this menu is not available.

• Name and Short name: enter group(s) name. If selected staves are in several groups, each name is aksed one by one.
• Font: same font is applied to full and short name. As all font settings, you can choose between favorites, fonts founds in the document, or a new font.
• Print name and short name: when not printed, the name is kept, but color is white. So your work is still structured in groups like "woodwinds", "Brass"... but hidden.
• Name and short name offset: fine positioning using the 2D plotter and arrow keys.
• Rotate name and short name: switch to rotate 90 degrees.
• Allow on single staff: ON recommanded in orchestral work. When all group' staves but one are empty and hidden, print or not the symbol (brace, bracket).
• Join staves: a switch to join or not the staves by vertical lines at each bar.
• Adjust symbol position: experimental. Try to adjust braces and brackets position.

• Name and Short name: change name and short name for each selected staves, one by one.
• Print name: never, first system only, always.
• Font and position: like for groups.
• Copy stave name to instrument name: self-explainatory.

• Mute: mute selected staves.
• Solo: mute all staves but selected ones.
• Coming soon: change volume of all selected staves' instruments
• Reset: reset reset mute/play state of all staves.

• Print staves: add/remove the staves from the current view.
• Hide if empty: in File > Printing options, if hide empty staves is ticked, you can exclude some staves from this hide process by switching it to ON.
• Edit display mode: the same as staff black triangle menu > Display mode. If several staves are selected, then one dialog is open for each staff. Then menu is closed.
  One major difference from the black triangle menu, is that, in case of merged staves, you know wich staff you are editing. You don't need to unmerge, edit, and merge.
  Note that in the case of merged staves, the printed staff follow the first voice only.
• Ghost rest: choose how to display ghost rests. I recommand to display with real rests, this show you missing note durations to fill the bar.
• Ambitus: display ambitus. In Harmony, we need to tick this in two places: staff display settings, and score display setting. It's done here in one shot.
• Hide jumps and targets, hide barline textes: new options in Harmony v9.9.8.
  In earlier version, it was at printing option level, all staves or only first, but you may want to see conditional parts at the top of each group of a conductor score, at piano right hand. So, hide it for piano left hand, and for second and next staves of each groups.
• Background and line colors: while writing, it may help you to focus on some staves, e.g. the singers between viola and cello on a orchestral score. Once score written, and at least in views, set the colors to white and black.
  Colors may also help your choir's members in Melody Player / MyrWeb, they can focus on their color.
  Colors can be stored as favorite, e.g. to re-use the same for Soprano on all your scores. For quick use, save also white and black in favorites.
• Force auto stem direction: little known feature, you can force the direction of stems (when set to auto), useful for 2 voices merged in one staff.
• Extend notes/graces stem to the middle of the staff: engraver books say that notes stem should always be extend to the staff center, but not graces stem.

• Rule name display: change the setting for all rules,
• Remove unused rules: quickly removed unused rules. Very useful when a drum staff is fully written, you can here remove the rules and the unused instruments to reduce file size and for better mixer lisibility.
• Edit rules dialog.

• Automatic beaming: since HA 9.9.9e, the automatic beaming can be disabled per staff.
  Once staff is full written, with automatic beaming enabled, disable it, manually change/fix beamings where needed, and you are sure that your handcrafted beaming won't be broken whil writting other staves.
  You can also disable automatic beaming for lyrics, which is the most common practice, even if nowadays beamed notes are accepted for lyrics.
• Change stem direction: force the stem direction auto/up/down for all notes of the selected staves.
• 3 actions to compute stems and/or beamings: if they break all the beamings you manually adjusted, close the menu by Shift+Esc and go to Edit > Undo.
• Pressure time of notes with breath comma: quickly change the pressure time of all notes having the breath comma, for Virtual Singer or woodwind instruments performance.
• Reset horizontal shift: cancel horizontal shift that may have been made unintentionally or notes added when Option > Automatic spacing control was disabled.

• Staff with bar numbers: enable or disable bar number display.
• Bar numbers settings: the staff black triangle menu > Bar numbers display. Open one dialog per selected staff.
• Font: change bar numbers' font for all selected staves, with same mechanism as other font (favorites...).
• and some settings applied to all selected staves in one shot: first bar of each line only, after the keysignature, etc.

• Staff with chord line: enable/disable
• Chord line settings: staff black triangle menu > Chord line display
• Edit as text: edit chords as text. One dialog open per selected staff.
• Font, alignment and show frames
• Edit title: the title is a short text on the left of the chords. Edit the title and choose font.
• Title font
• Hide chords: chords can exist but may be hidden, e.g. you write lyrics in a free object outside the staves, chords are played by an instrument but hidden...

Similar to chord line settings: enable/disable, edit, font, alignment, frames, title and visibility.
Lyric specific settings and actions available:

• Sing lyrics: enable/disable the selected staves' singer, same as right click on each singer.
• Lyrics language: select the Virtual Singer language and apply it to all selected staves in one shot.
• Edit Virtual Singer voices: for each staff, open the voice selector/editor.
• Number of visible lyric lines: experimental, quickly set n lines visible, hide the next ones.
  May be hazardous on complex scores, with conditional parts in repeats.

This menu reveals hidden clefs, keys and time changes. You can then jump (select the bar) to visible or hidden clef/key/time.
This may be very helpful to "debug" a MusicXML import and save you some headaches!

A tool deletes useless clefs that appear in score after XML/PDF import.

Objects are dynamics, tempos, piano sustain pedals, ottavas, chord diagrams, texts, pictures...
Here you can change settings and perform some actions on them.

Only present objects are available. e.g. if there is no Tempo in the selected staves, the tempo menu is disabled.

• Hide dynamics, ottavas, tempos & pedals: a single option hide all them.
• For dynamics, tempos, ottavas and pedals:
  • Apply to staves: staff only, merged staves, group, whole score.
  • Display on view: choose view(s) where objects are printed.
  • Font: when applicable, change font of all objects of selected staves.
  • Select: select all objets of selected staves.
  • ... more to come in future version.
• Texts, pictures, diagrams... not yet added.
• ... in future version: ensure object are in staff area, not overlapping another staff.

To understand what are parameter curves, read the Parameter curves chapter of Harmony Assistant manual.

• Choose curve to display: select one if list (40+ parameters including MyrSynth Guitar), it's then displayed on all selected staves. Common curves are velocities, delay and pressure, volume and all FX processor parameters.
• ACtive curves: list of existing curves where you can quickly disable/enable their interpretation. Curve datas are not removed.
• Delete disabled curves: if you disabled curves from the previous item, and don't want them any more, you can delete them in one shot. This may reduce the .myr file size.
• Delete empty curves: delete created but empty curves, no file size reduction.

Unsorted actions and features go here. To be extended.

Settings and actions are applied to all selected bars, in current view, or available only if one bar is selected.

• Cycle stem direction: cycle through auto, down and up
• Reset horizontal shift: cancel horizontal shift that may have been made unintentionally or notes added when Option > Automatic spacing control was disabled.

The menu is available in English and French. Default language is the one used in the application.
If you are Italian or Spanish or ..., you can force to the one your understand the best.

Note that the language setting also apply to my other scripts which are always, at least, in French and English, but some of them may have more translations. If you force English or French, you may miss those translations.

Visually impaired users can select a system voice that will tell them what happen in my scripts

• Alerts, messages and questions (confirmations),
• Focused or hovered button caption,
• Focused or hovered component type and value, e.g. "Blah blah, radio button, unchecked".

You can customize some settings like speech rate and frequency.
Note for Windows users, the speech rate has strange values. Try a value between 200 and 350, even if the displayed value is higher when you change this setting.