Because text and leader lines are the most common objects used for annotations, AutoCAD Mechanical toolset provides a single configuration point (the Standard Settings dialog box) to specify their settings. The settings are referred to as the master settings for text and leaders.
By default, all annotations derive their default values from the master settings. If you change the master settings, the corresponding settings in each of the annotations follow. However, if you do not want a specific annotation to follow the master settings, you can override the settings for that annotation.