Required Error Types
This selects the error types to find in the design. When the check box is selected the Error type selected will be used by Find. This provides you with a method refining the errors types to search through when finding error markers.
List Errors In Design
When this is checked, the error list on the left hand side will only display error types where an error has been found during a design rules check.
List All Error Types
With this button checked, all errors types will be displayed regardless of whether they appear in the design or not.
Centre View On Found Item
When errors have been found, you can opt to select that they are moved to the centre of the view or left in their current view location.
Check/Uncheck All
This provides you with a mechanism for selecting (Checking) or deselecting (Unchecking) all the items in the errors display list.