How does one add options to the Scale options for drawing views?

This question was asked some years ago, with no real answer was given.  I've searched the forums, but had no luck.

My boss has scale options for drawing views that are not standard (1:20, 1:50, etc.).  How does one add options to this drop-down list?  My boss does not remember how he added those options so many years ago.

There are some scales I use several times a day that are not standard but are frequently used in my company.  Being required to select User Defined, then define it, seems a waste of time. 

Thanks in advance,

-Chris Canterbury

SolidworksDrawings And Detailing