This is a partial, visual workflow to document local use of Marc Edit. This page details how to move call numbers from the 050 field to the 090 field and then append a constant “eb” to the end of the call number field.
Move the call number from the 050 to the 090.
Append “eb” to the end of the 090
Tools>Edit Subfield
By running a quick report within MarcEdit (Reports>Field Count), you can see how many records have 050 fields. If not all the records have call numbers, local practice should dictate the what happens next.

