As with the piano harp notation is written on two staves and is non-transposing. The lower staff is in bass clef, the upper in treble clef. If required by the register both staves can be in the same clef, either bass or treble.
Harmonics are indicated by a small circle over the note and sound an octave higher than written.
Changes in pedal position should also be written into the score and are most conveniently effected during rests, so that the musician has sufficient time to prepare them.