If you would like to work with or highlight only a subset of the data, then you can use both the search function and the range sliders provided in the Filters panel. The search function will look at every value and see whether it matches the given criteria. How the search is performed can be customized by using the drop-down list at the beginning of the field.
For categorical variables, drop-down lists are provided. They allow to select which values should be visible. Multiple selection can be made by holding down the Ctrl key while selecting individual entries. Ctrl-A can be used to select all entries. The Reset button will restore the given filter to its initial state
For numerical variables, range sliders are provided that allow to define a given range that the value should be in. Click on the left or right end of the range slider, and drag it up or down to define the filter range. Tip: double-click on a range silder to reset it to its full range position.
You can use the "Hide values filtered through the sliders" and the "Hide values filtered through the search" check boxes to define whether objects that do not meet the criteria should be removed from the display or simply greyed-out.