I would like the ability to have a custom field that i can choose what step of the workflow it appears in. Ie fields that display in 'edit issue', but also are displayed when hitting 'resolve' or 'close' issue - to remind users to enter this data.

Similar (but prob seperate issue) is ability to enter work done at the resolve screen - otherwise have to resolve the issue, then remember to enter work done. having this afailable on the resolve and close screens (customisable whether it displays of course) would help to remind users to enter this info.