Hi, Stefan K. As you might have read in the Attribute Macros section of the Roll20 Wiki, Attributes will only autocomplete within the "Actions" fields of the Edit Macro window, and the equivalent field for Abilities (on the Attributes & Abilities tab of a Character Window ). When editing within those two fields, you can activate the autocomplete feature by typing "@c", where c is a character that can found anywhere within the name of an Attribute associated within a Character that Can Be Edited & Controlled By you. In your case, typing "@d" should be sufficient for the autocomplete function to suggest the dexterity modifier Attribute of a Character that Can Be Edited & Controlled By you.