You can define for each model the columns that should be hidden in the Action Items and Findings pages. This is done by defining one or more scales and adding them to the Properties/Bundle.xml file using the findingsTab and actionItemsTab options, as shown below:

configuration/models/[ModelFolder]/Properties/Bundle.xml:
<bundle>
  <!-- sort order for columns -->
  <findingsTab hideColumns="SCALE_PRIORITY;SCALE_SEVERITY" />
  <actionItemsTab hideColumns="SCALE_REMEDIATION;SCALE_SEVERITY" />
</bundle>