Fermi Redmine

How can I configure the issue submission form to our specific needs:

https://cdcvs.fnal.gov/redmine/projects/401-lhc-cms-detector-upgrades-project/issues/new

For example under "Tracker" I'd like to have
-- Resource change
-- Schedule change
etc.

I also need better workflow items on Status:
-- Approved by L1 Manager
-- Approved by L2 manager
etc.

In general, is there some documentation on what I can reconfigure and how to do it?

Thanks
Lucas