Drop down box for categorisation on plot/scheme documents

What is your challenge?

Unable to add options to the drop-down boxes for categorisation on plot/scheme documents. Customers want to be able to add their own options, so it's customisable to them.

How does this impact you?

Currently just have to use what's there, even though it may not be the right fit.

Please describe your idea

Give customers the option to add their own options to the dropdown list managed in the Admin area.