You certainly already know that you can add a Cypher statement as a favorite by hitting the star button next to the input box
A very useful trick is to start it with a comment, so that the comment appears as the title of the favorite in the favorites tab.
// Isolated nodes - count by label
WHERE NOT ((n)--())
RETURN DISTINCT (labels(n)), count(n)
Will be listed as “Isolated nodes – count by labels”
Useful isnt it ?