Invisible stave

SIMPLE AND VERY EXPLICIT INSTRUCTIONS.
You do NOT have to click on any note or any stave or anything else in the file
that you have loaded into Musescore.
Just go to the top of the screen. Click "Edit" and then "Instruments".
This will open a dialogue box entitled "Instruments".
In a big window on the right side of that box you will see a list of the staves.
The first column gives their names. The second column, labelled "Visible", is a column
of little boxes. They will probably each have a "tick" or "V" in them. Just
click on to uncheck the little box in each stave which you want to disappear.
Then of course click OK and the job is complete.

Dear friends, Thank you for your previous attempts to help us. But most
of your explanations rather confused me. This simple solution is
"buried" somewhere (page 39) in the 246 pages of the main handbook. The
fact that this feature is possible is a wonderful present for those of
us in lockdown at home who want to (try to) play a concerto with the
wonderful accompaniment of "robots", but without being confused by the
visible jungle of all the notes that they are playing. Thank you
Musescore.

Click on the stave.

To be clear: "right click" means click with the *right* (as opposed to left) mouse button. That terminology is obvious enough for two-button mice. For a one-button mouse, the equivalent gesture is usually Ctrl+click. For touchpads it might be Ctrl+click, Ctrl+tap, or two finger tap. Consult the documentation for your device if you aren't sure.

Anyhow, whatever the gesture is for your device, you need to that on the staff to display the context menu that contains "Staff Properties" and other actions.

But as noted, to make a staff invisible - if that is your goal - you can do that by pressing "I" (shortcut for Edit / Instruments) and hiding the staff in the resulting dialog.

It's also possible you are trying to do something else, like automatically staves that are empty for some particular system, or delete a staff completely, etc. We can give you more specific help if you explain in more detail what you are trying to do (and attaching the score you are working on is usually helpful too).

Yes.

see: https://musescore.org/en/handbook/viewing-and-navigation#visibility-opt…

They should be invisible on your screen. If not, you did something wrong, like make a measure in a hidden staff invisible.

It's not totally clear what you mean when you say you highlighted some measures an unclicked the visible box.
There would not normally any "Visible" box available after selecting measures. The only cases I can think of here is if those measure happened to be completely empty so the selection contained nothing but rests, or else if the piece was in 4/4 time and every measure in the selection contained a whole note. In either of these cases, the Inspector would indeed show a Visible checkbox, to control the visibility of those rests or notes. And unchecking it would cause those rests or notes to become invisible. They would show up grey on screen so you can still edit them, but invisible when printing. The measures themselves remain, just the contents are invisible.

However, I am thinking it is pretty unlikely that this is actually what you intend. My guess is that you either want to delete those measures completely, or else you want to hide the entire measures (probably because they are empty). To delete measures, select them and press Ctrl+Delete (or Edit / Measure / Delete Selected Measures). To automatically hide all empty measures where possible, use Style / General / Hide empty staves. This will still leave empty measures on staves that also contain non-empty measures, as per usual engraving convention, but if you really want "holes" in the score where the empty measures appear, you can right click them individually, go to Measure Properties, and uncheck "Visible" there for the particular staff on which you wish the hole to appear.

If that doesn't solve your problem, please attach your score and describe in more detail what you are actually trying to accomplish.

Use Format->Style and check Hide empty staves? I'm not sure if this does what you want.

Or maybe right click, Staff Properties, set the Cutaway option?

It is, in the staff properties: https://musescore.org/en/handbook/staff-part-properties
Check 'invisible staff lines'.

May I ask why you are considering going to all that trouble, though? I can’t think of anything that really buys you. After all you can already mute the channel in the Mixer if you want, change it’s sound, etc. And if there is something I am missing here, and it really does provide some benefit, maybe better to consider how we could address that deficiency so people don’t resort to awkward workarounds like adding invisible staves just for chord symbols.