Transit Date sets the initial date for the horoscope charts so if you want to look at a future/past horoscope, change this date. You can reset to current date by click on today.
Birth Orb sets the amount of degrees to allow for an aspect to be shown. in the birthchart ( best around 7 - 10) Max 10
Relationship Orb sets the amount of degrees to allow for an aspect to be shown in the relationship combatability ( best around 1-3) Max 5
Horoscope Orb sets the amount of degrees to allow for an aspect to be shown in the daily and monnthly horoscope. ( best around 1-3 durations of transits maybe unreliably long if greater than 2 or 3) Max 5
The SmartOrb setting alters the power of the aspect orbs depending on the planet and aspect. Sun,Moon,Ascendant and Saturn are given wider orbs and sextile,trines and minor aspects given less power with a smaller orb. This is relative to the orb value provided