How can I tell what to enter in a specific field?

Right clicking on most any field in a CORE document will yield a number of options.  One of these options is called “Field Level Help”.

Screenshot of General Information tab with the secondary screen for Field Level Help highlighted after right clicking on the Event Type field.

Selecting this option will provide some additional information about the field in the right hand side of the screen.

Screenshot of a Purchase Order (PO) Document with the green circle around the Event Type field and the Field Level Help screen displayed on the right, with a green box around it.