Show character sheet button. Help

Hello. I messed up while working on prep and hit the show character sheet button for one of my players character sheets and they have some character secrets the party don't know about. I'm still learning Roll20 and don't know if it only shows the players who are on when I hit it or will show them when they get on. If it does show them the sheet, is there anyway to undo it?

You can see which character sheets or handouts are visible to players by opening the journal and looking for small dots to the right of each item. Each dot will align to a specific player, and there will be a color that aligns to 'All Players' (blue in my example below -- not sure if blue is always used for 'All Players'). it's It'll look like this: So if you see any dots next to characters or handouts that you don't want to share, just open the edit page for each sheet and remove any players from the 'In Player's Journals' field.  Also you do not  need to list yourself as GM in that field -- you always have complete access to everything while logged in as GM.  (If you use the 'Rejoin as Player' button, that is when you would need to be listed in those fields, but it's best to use a Dummy Account for testing things anyways, so that wouldn't be an issue.) And just to be clear: the colored dots show if that handout/character is set to 'In Player's Journals', but there's no external visibility for the 'Can Be Edited and Controlled By' settings. You have to open the Edit page of the sheet to see who has edit & control access.

If you hit the Edit button on the upper right hand corner of that sheet, I will take you to where the permissions are.  Show to Players probably set the "In Player's Journals" to all players, which would allow everyone to see the Bio & Info tab.  It shouldn't have changed the edit permission at all, which controls access to the Character Sheet and Attributes & Abilities tabs.  If the secrets are on the Bio & Info tab, you will need to redo your "In Player's Journals" permissions.

Something else to be aware of: players will never see the character sheet tab of other players unless they are given Edit permission. They can see the Bio and Attributes & Abilities tabs, if you give them view permissions (as Show to Players does), but that doesn't let them see the Character Sheet tab. So if the secrets are there, don't worry - they haven't been seen.