Abstract: A system and methods for comparing graphic elements in a changed document to those in a reference document is described. Attributes of selected graphic elements are first adjusted before comparing so that comparing does not identify certain document changes.

Abstract: A universal multi-function tool in the form of a painter's knife is provided in which the tool includes a slender pivoted, elongated element with a sharp tip for puncturing caulking tubes and an integral pusher bar specially adapted for contacting glazing points to serve as a glazing point setter for forcing the toothed portions of the glazing point into corresponding window and door frames. The tool is also provided with a paint can opener and both phillips head and flat head screwdrivers to permit storm window screw removal as well as light fixture plate removal. A knife is also provided for removal of the caulking tube tip, thereby eliminating the necessity of a razor knife, although a detachable razorblade holder is provided as an optional feature for cleaning windows. All of the tool elements are pivoted at respective ends of the tool, with the subject painter's knife providing no sharp objects protruding into the painter or his pocket.