Tokens seemingly hid on module

I am not 100% sure if this is the best place to post this and if it is not let me know. I recently purchased the Tomb of Ann module for 5E. As I'm looking at some of the predone pages the tokens for the mobs are there. But on some of the pages it seems like the tokens are grayed out as if it is under something and i cannot click on it. Anyone have any advice? I'm not sure if I can post pictures of what I'm seeing or not couldn't find a rule in the forum for it, but if i can i will.

Those grayed out tokens are on the GM Layer . Players cannot see them. The GM can reveal them when needed.

keithcurtis said: Those grayed out tokens are on the GM Layer . Players cannot see them. The GM can reveal them when needed. Thank you for the response. I've been trying to figure this out for hours, forgot to switch the layer I was on.

Hello Scot R.,  I have moved this to the Specific Use Questions & Macros forum.