There is another thread very similar to my situation: Add Capture Vitals and Visit Notes to Past Visits
I am assuming the above is for a non-standalone OpenMRS.
Is it possible to add capture vitals and add visit notes in OpenMRS Standalone?
When I do the steps from Form is not showing in openMRS UI, there seems to be no [Add Form to UI] link/buttons under Home->Configure Metadata->Manage Forms. All five forms (Admission Simple, Discharge Simple, Transfer Within Hospital Simple, Visit Note, Vitals, are v1.0, and Built-in form cannot be modified.