I'm brand new to Visualforce and coding in general, and am trying to figure out how to filter the record results pouring in to my Visualforce Page from a standard controller pulling opportunity records:

standardController="Opportunity" recordSetVar="screening">

I want to only show records based around the value of a field on the opportunity page.

Thanks in advance for your help. 

I'm brand new to Visualforce and coding in general, and am trying to figure out how to filter the record results pouring in to my Visualforce Page from a standard controller pulling opportunity records:

standardController="Opportunity" recordSetVar="screening">

I want to only show records based around the value of a field on the opportunity page.

Thanks in advance for your help.