@MikeInBoston, to my knowledge it isn’t possible to hide articulations directly as a properties setting.
Key Editor Workaround — Perhaps you already know all of this:
One of the big reasons I switched to using Dorico a couple of years back was its Play Mode and the associated ability to affect the playback sound only in the Key Editor. (I privately sometimes call this “DAW Mode.”)
Say you have a snippet entered with just a slur, but you want some staccatos, marcatos, accents, etc.:
Switching to Played Durations, one can create change-of-duration articulations (staccato, etc.) that won’t affect the notation. Editing the Velocities (marcato, etc.) in the editor allows for change-of-force articulations*:
It’s definitely more time-consuming to tweak than a simple “Hide” feature in the properties panel would be, but the trade-off is great flexibility to get the playback you want without having to futz with separate playback-only files or flows. (Caveat: I still find that for my jazz projects I need a second playback-only flow, as it’s a simpler way to get NotePerformer to “swing.”)