|It would be nice to have the possibility (in addition to On View and On Edit) to set the form behavior for an On Add event.|
It's very common that the user can insert some data when creating the record, but later these data are read only.
Until now I used the workaround with the criteria [Date created]=null, but it make all more complicated by forms with a lot of columns.
There is also an easy way to implement it in the setup GUI. In the "Form Behavior" page there would be a new column "On Add". Per Default this column would have the value "Like Edit".