YeS-PreFilterSelection enables you use predefined filters to select elements in a view. And you can change the order of filters so the most frequent used one could be the first. As you know, now in Revit, you have to select elements, click the Filter button to show filter dialog, select the categories you want to select to filter the elements. And you need to do this every time. Which is a quite time-consuming and tedious work. Through the PreFilterSelection tool, it's very convenient for you to select element in some frequent use categories.