Conceal
Withhold it where everyone can see it is withheld; the cover never comes off.
The black bar that points at what it hides.
Seen in Man Ray, The Enigma of Isidore Ducasse, 1920
Try it on your work
Take one thing that is always visible in your work and cover, wrap, or store it out of sight for three days, leaving everything else in place. Who asked after it, including you, and when, is the measurement.
Withhold, for one full conversation, one piece of information you would normally volunteer: not a lie, just not offered. Note whether it was missed, requested, or independently reconstructed; each outcome means something different.
Remove one feature or option from view (undocumented, unlinked, still functioning) for a trial period. Whoever found it anyway needed it; whoever didn't notice tells you what its prominence was costing.
How it has been used
Withhold something from view so its absence operates: the unseen shark, the redacted line, the covered statue. What's hidden organises the attention of everyone who knows it's there. The move forbids the reveal: this operation ends the moment the cover comes off; disclosure is a different move.
Where it leads
Grouped under Take something out of view for now