Revealing all initiative rolls

I'm prepping for a large battle, and I had the notion to roll monster initiatives ahead of time so I don't have to click through 15 different sheets while the players are waiting. But I know if I do that, the monster rolls won't appear in the players' tracker. Is there a way around this? Some kind of reveal all button?

Hi Zack S.,  Put the monsters on the GM layer, roll them normally, they will appear in the Turn Tracker but the players won't see them.  When it is time, move the monsters to the Token layer.

I knew there was a way ;)  Thank you very much!!

I’m in the middle of running a big battle - 50 odd goblins with a few shamen, bosses and trolls thrown in. i used the macro below.  If you set it as a token action, it rolls the initative for any token (including characters) you have clicked on and adds it to the tracker. Ps - to simplify things I split my goblins into 4 groups (archers, spears, swords and cleavers - each had their own token pic) and gave them just 4 initiative rolls rather than 50 /ooc &{template:default} {{name=@{selected|token_name}'s Initiative Roll}} {{Initiative=[[((1d20 + @{selected|dexterity_mod})[Initiative] + ((1d8)*0.01)[Tiebreaker]) &{tracker}]]}}

…. Ps ……. If rolling initative by groups - have a spare token for each group just off the map and use that for initative - because once you kill / delete the token that rolled the initative it is auto removed from the initative tracker.