Create drawings from models (Creo Elements/Direct Annotation) > Configure Creo Elements/Direct Annotation > Creo Elements/Direct Annotation default settings > Set dimensioning defaults > Dimension specific settings
  
Dimension specific settings
Click File > Settings > Dimension > Dim Global Settings to access the Dimension Specific settings. The Default Settings browser opens. See the Description column in the Default Settings browser for information on each setting.
You can change the following:
Coordinate
Standard (style)
Use Orientation
Fit Arrow
When the distance between the first extension line and the second extension line of a coordinate dimension is smaller than the arrow size, you can choose whether to draw the dimension's arrow.
Yes: Draw the arrow
No: Do not draw the arrow
Diameter
Prefix
Postfix
Center Line Visibility
Both Diameter Arrows
Radius
Prefix
Postfix
Center Line Visibility
Chamfer
Prefix
Postfix
Thread
Format
Right Hand Thread
Left Hand Thread