Shifts the sleeves downward to give extra room in the armpit, measured as a percentage of the sleeve diameter. If in doubt, go with the default value.
Note: This option does not change the diameter of the sleeve. To make the sleeve larger or smaller, use the Sleeve ease option.
Note: The Raglan scoop length and Raglan scoop depth options also affect the amount of ease in the armpit.
Negative values will move the sleeves upwards. Use with caution, even on stretch garments, as this can easily cause binding at the armpit.