For definition list of names values for the fields (in case you need to do some advanced magic with them), please refer to the developer's Tracker Field Types overview.
Some of the field types have some more documentation including examples, etc:
Overview
Enable or disable what field types are avalable in Tiki
To Access
From the Trackers page, click the Field Types tab.
On this #tikiexpresstutorial, using #tiki19 I’ll show you:
How to enable a feature from the Control Panels
How to enable a Global Feature from the features panel
How to enable an Interface feature
A quick overview of the Programmer features
And where to look for feature options