A computer implemented method, computer system, and article of manufacture embodying computer readable program means direct a computer system to create in a window an insertion bar for inserting hierarchical level identifiers into any hierarchically arranged data. The method includes the first step of inserting a blank line at the location of an insert event, in response to detecting the insert event at the location in the window. The second event includes the step of counting a number of hierarchical levels above the blank line and placing a marker on the blank line, each marker corresponding to a horizontal position of each hierarchical level, thereby creating the insertion bar. The third step includes the step of in response to detecting a move event over one of the markers in the insertion bar, creating an additional hierarchical level identifier of the same hierarchical level and in succession to the hierarchical level corresponding to the selected marker.