Halo and outline

[MarcelSt-Germain]

I have many labeling that I want to change the halo size and removing all outline.  I think I ask before but, since I can't find it...

How to make a script who parse the active map, pass all layers and class of annotations then change the holo size and remove previous outline ?

[DavidSolari]

Getting the CIM Definition for your layer and diving through the property tree until you get to the label's text symbol should let you edit the halo and outline properties.

[MarcelSt-Germain]

Impossible to do it manually if you have hundred of annotations layers.  Need a script 

[DavidSolari]

Correct! Use the arcpy.mp module to loop through your map layers.