Obviously, you can get any scale you want by typing in the appropriate
decimal value. It is somewhat unbelievable to me that you cannot also type
a fraction into the scale edit box.
I would love to be able to edit the scale pull-down list, but have been told
that it is not possible at this time. In my industry, for example, people
are used to seeing a scale listed as 3" = 1'-0", not 0.25, 1/4, or 1:4. Not
only that, we use an approved set of standard scales. Being able to enter
those options (as well as deleting non-standard scales) would be very
helpful.