Hi There. I am Bing and I look forward to helping you with your issue today.
Could you please be specific about what drop-down options are they, better give a screenshot pleaser? What are the current or default option items?
Got the screenshot. Thanks.
Do you mean how to add custom fields for document properties in Document Libraries of SharePoint?
It seems not that simple, because, per the screenshot, you are using a customised document library, the fields such as "Cost Centre" and "CIPP Classification" are not standard fields of SharePoint Server. Please confirm?
You need to go to Site Settings > Galleries > Site Content Types, and modify existing the content types there by adding one more option in addition to the existing year numbers.
FYI - http://www.dotnetcurry.com/ShowArticle.aspx?ID=620
I think under Site Content Types you have a Content Type named "Record Category" (display name), actually name should be "RecordCategory" per SharePoint convention. Find and edit that content type.
Seems a bit hard for you to walk through the options there. Do you want to do a remote session so I can demonstrate or directly fix it for you?
I used to have a SharePoint 2010 VM so probably you can remote access it for practice then go back to your production server to make actual changes. Let me check...
Sorry, not available now, it was deleted when cleaning up my VM library... :(
If you do prefer this one, I have to get one from somewhere or manually install it from the scratch, then I would offer your Premium Services to cover it. Please let me know your thought.
I now opt out and let other experts serve you. Good luck!