Preferences: Main - Sizes System
Default Name for Base Size
Here you can set the default base size name. This name will be used for new grading.
Default Sizes Name Increment
This increment is used when Inserting or appending sizes. for example, if 2 is set, added sizes will be in steps of tow (e.g. 38, 40 ,42 etc...)
See also: PDS Preferences