Maps carry more spoilers than almost anything else in a campaign, so it is worth understanding exactly what each hiding control does. All of the Secret? switches below are Game Master only — Map Managers can neither set nor clear them.

The four things you can mark secret

Secrets that hide themselves completely

Two things are hidden so thoroughly that players have no way to know they exist:

• Game Master Secrets on a map — a separate field from Notes, shown in its own tab that only Game Masters see. Notes are for your players; GM Secrets are for you.
• Secret dynamic features — filtered out before the map data ever reaches a player's browser. There is nothing to inspect and nothing to find.

The same is true of links to secret content: if a pin links to a secret Place, players see the pin without that link, and cannot tell a link was removed.

Checking your work

Marking things secret one at a time is error-prone. Chronica gives you two ways to review a whole map at once, and both are worth making a habit — but know what each one actually checks:

• On a legacy map, the Map View Toggle set to Player View shows you the player's map, with one addition: your secret tiles still carry a small eye icon so you can spot them. Everything else is what they see.
• On a dynamic map, Preview player vision checks your fog coverage — it hides everything the fog hides. It does not hide features you marked secret, so read those off their secret markers instead.

Between the two, a thirty-second sweep before a session beats finding out mid-scene.