Chorded navigation where I can select the srars with S, and then select min four stars with 4. But this requires good hinting (also, filters should be invokabl

Chorded navigation where I can select the srars with S, and then select min four stars with 4. But this requires good hinting (also, filters should be invokable within any product, so while viewing a book you can select its genre and filter it out) And minor things like a list of 6 radio buttons for stars can be a single line of 5 stars