A transition corner or drywall corner which transitions from a rounded exterior corner to a right angle corner at the trim. The transition corner has an exterior side with depressions which receive mud, an elevated longitudinal bead along an apex of an acute angle of the exterior side which facilitates the receipt of mud. The interior side is shaped to be received by the shape of an exterior corner, which is generally rounded, and is coated with an adhesive means to allow fixing and adjustment of the transition corner at the trim to be in vertical alignment with the exterior corner.