List Editor Task Pane
You can use the List Editor task pane to show and change validation list values.
Below is a sample.
You can find an item easily by typing several characters in the search box.
You can tune the font family and font size.
Use the Show List Editor button of the ribbon Options menu to show the task pane if you closed it.
Note that the add-in hides the undocked task pane for cells with simple values.