Background mask attribute impossible

[c_carbonnery]

Hi,

I would like to turn on background mask to an attribute.

Unfortunately I can't find the  litlle "triangle" for having access to more option in the text editor as you cas see in the capture below.

I use autocad for Mac 2024 (seems similar in 2023).

I can activate background mask to regular textmult by clicking the box on the property panel. but this box is unavailable for attribute.

Regards,

Simon

[c_carbonnery]

I just found the solution few topics below https://forums.autodesk.com/t5/autocad-for-mac-forum/attdef-background-mask/m-p/12421536/highlight/t...