Grasp the Ryobi's keyless chuck's upper slotted portion with one hand while holding the drill's handle with the other. Point the chuck away from you while changing bits.
Jerk the keyless drill chuck's slotted portion quickly in a clockwise direction to release the collets' holds on the drill bit shaft.
Continue turning the chuck in a clockwise direction until you can slide the drill bit out.
Slip the new drill bit into the chuck opening, shaft-end first. Open the three chuck teeth wider by turning the chuck tip in a clockwise direction if the shaft of the drill bit is larger in diameter.
Grasp the chuck tip and turn it in a counterclockwise direction while the new drill bit is in the chuck. Jerk the chuck's slotted tip counterclockwise to make sure it is fully secured into place.