The kneeboard includes a deck, a securement strap, and an adjustable bolster. The deck has a first side end, a second side end, a holding side, and a support side. The support side has a first part of a two-part fastening system disposed thereon. The securement strap is attached to the deck and is configured to secure the kneeboard to a limb of a user. The adjustable bolster is attached to the support side of the deck and has a first wing and a second wing. Each wing includes a second part of the two-part fastening system. Each wing has a flat configuration and a raised configuration. In the flat configuration the wing is engaged with the support side a minimum distance from a side end. In the raised configuration the wing is engaged with the support side and spaced apart from a side end greater than the minimum distance.