Trill is a musical embellishment you can use in songs and melodies.
Trill is defined as a fast movement between 2 notes. Normally the movement is between the note that you want to trill from and the next note directly above it in the given scale.
Here you will find 65 trill fingerings from note A of the 3rd octave to Gb of the 7th octave.

These fingerings are identical on all types of saxophone (soprano, alto, tenor, baritone, and bass) unless otherwise noted, and they are designed for the rapid alternation between two notes that are, as mentioned above, a semitone or a whole tone apart. Keys to be trilled are indicated by a red arrow. Please remember that when multiple keys are to be trilled, the keys should be pressed and released simultaneously. But some fingerings have an alternate pressing and releasing of the keys. Please note the notation under the fingerings.