Trying to delete Form Code list

[HardlyClerkin]

On any created form like say picking sheets there is a form code where all the formats that can be printed for that particular form, is there a way to delete the ones that aren't in use anymore?
We have multiple people printing picking sheets and some are using old forms and no one seems to want to listen to use the one assigned number.

 

[BigLouie]

Library Master, Setup, Report Manager. Delete the form codes using Report Manager.