This documentation has the info on how to create a roll button: <a href="https://wiki.roll20.net/Building_Character_Sheets#Sheet_Rolls_and_Roll_Buttons" rel="nofollow">https://wiki.roll20.net/Building_Character_Sheets#Sheet_Rolls_and_Roll_Buttons</a> Basically, you're going to have something like: <button name="roll_monster_init" value="Monster Initiative: [[1d20+@{modifier}]]"></button> The value doesn't have to be an inline roll, but it's basically whatever you want to send to the chat window. A sheet worker isn't necessarily needed, unless you need that value to be somewhat dynamic, but even then...you can probably get away without it for a simply initiative roll.