If when you open a view, you may see features in the Selected Features pane highlighted with a red or a mauve background color. This indicates development changes have impacted the view as follows
A red background indicates the feature is used in reports but has been removed from the class. To remedy this situation, right-click and select Usage to find the reports using the feature, remove the feature from the reports, and then remove the feature from the view.
A mauve background indicates the feature is a method to which a parameter has been added. To remedy this, check the Show Methods check box in the Selected Types pane.