Disable "Speak as" in the chat for the players

Hello Roll20 community,  Is there a way to disable the "Speak as" function in the chat for the players ?  One of my player sent me a screenshot of his chat and to my bad surprise, found about all the NPCs I had prepared for them :    After checking the settings menu, forums and various places online, I couldn't find any reference to this.  This is hurting the immersion and the "Aha !" effect when my players meet a cool NPC with a funny name pun in it... Thanks for the help,  Hadrien

Check the "In Players' Journal" and "Can Be Edited and Controlled By" fields on those characters (Press the edit button with the character sheet open). That list is populated from characters the player has permissions for.

If you remove the players form the "Can Be Edited and Controlled By"-field, the NPCs should disappear from the "Speak As"-dropdown.

Hey  keithcurtis  and  Andreas J. , you were both correct.  Thank you so much !!!!!  Kudos to both of you