Can I give information to only one player?
Yes! This is supported via our Tab Types and Options tool.
You can do this by having a Hidden Tab on a Character Sheet. A Hidden Tab can only be viewed and edited by the Campaign Owner/GM, and the Character Sheet owner.
By using this feature, a GM can add images and text at the appropriate time (along with any widgets and formatting you might find useful), and have that only seen by the player.
Currently you are unable to hide this information on their sheet until ready to reveal, but you can copy and paste the contents of a prepared Private Note to the Hidden Tab on your player's character sheet.