Filter options can be found as per the screenshot. 

You can use four filters at any one time.

The first part indicates the Column you wish to filter on.

The second part indicates the filter itself.

There are 2 types of filters. Static and Dynamic. Static are fixed filters that you have previously set. Dynamic Filters use the text from the columns themselves. In the screenshot above, the dynamic filter drop down is shown.

To edit the static filters press the 'Edit Static Filters' button.

The Edit Filters Screen appears.

The first four filters available to you are odds ranges. The rest of the filters apply to a simple text search.