Silence a notice you have already answered
Some of the yellow cards above a board describe something that is never going to change. A cross-project board will always reach items you are not allowed to read, and it will say so every time you open it. A type without the order field will not grow one because you looked at the board again on Tuesday.
You can close such a card, and it comes back tomorrow. That is on purpose: a close means "not now". When you have read the sentence, understood it and decided there is nothing to do, you want the other answer. That is Don't show again on this board, and it lasts.
It is yours, and it is that board's. Nobody else who opens the board loses the notice, and the same notice on a different board is a different question, so you are asked it again there.
Steps
- Read the notice above the board.
- Select Don't show again on this board on the card. It sits next to the close button.
- The card goes, and a short message tells you where it went.
- To bring it back, open the board's More actions menu and select Show again, followed by the name of the notice. It returns at once. There is no Save, because this was never part of the board's settings.
What you should see
The notice disappears and stays gone. Close the tab, come back next week, open the board from a different machine: it is still gone, because the answer is stored in your own Azure DevOps against your account and that board.
A Show again entry appears in the More actions menu for each notice you have hidden on that board, and for none if you have hidden nothing. Each one carries a short name, since the notices themselves are paragraphs. Bring back the last one and the entries are gone again.
Hiding a notice never hides anything else. The cards, the counts and the
columns are untouched, and a count that was marked + because something could
not be read is still marked +. You have silenced the sentence about the
shortfall, not the shortfall.
Notes
Not every notice offers the choice, and the ones that do not are the point of the feature rather than a gap in it.
A notice that says the board has stopped being current can never be silenced: the refresh that failed, the connection that is being re-established, the counts frozen at their last good values. A board quietly sitting under a hidden notice of that kind would be showing numbers that are no longer true with nothing on screen to say so, which is the one thing this product will not do. Those cards still have their close button. Closing one hides it for as long as that failure continues. Once a refresh succeeds, the close is forgotten, so the next failure shows the card again, and so does opening the board again.
The warning about writing the backlog's order is not dismissible at all, by either gesture. It is addressed to the people who did not turn that option on.
A hidden notice is never brought back for you. If the condition clears and returns later, the notice stays hidden, because you already answered it. Restoring it is something you do, from the menu.
The choice is not offered on a board with no saved query behind it, which is the Board tab reached from a query you have never saved. There is nothing lasting to file the answer against. Some of those boards share one answer between them, so hiding a notice on one would hide it on the next one you open. The others are given a fresh identity every time the query is run, so the answer would be lost the moment you left the page and nothing in the menu could bring the notice back.
The same tab on a saved query does offer it. That surface has no settings panel at all, which is why the way back is the More actions menu rather than a setting.