A method of merging different versions of a file within a software development system can include, within a first window, presenting a graphic object which indicates a difference between a base version of the file and at least one contributor version of the file. Responsive to a pointing device being located within a defined area surrounding the graphic object, the method can include displaying a floating window having a first section and at least a second section. The first section can include a portion of the base version and the second section can include a portion of the at least one contributor version, wherein the first and second sections of the floating window are selectable. The method also can include receiving a selection of one of the sections of the floating window and accepting the base version or the at least one contributor version according to the selection.