The command (alias) WHERE requests mouse input from the user, using the indicated click position to define the symbols XMOUSE and YMOUSE in units of the plotted data. This command works only in Window 1. It does not function in other windows that have been opened with SET WINDOW/NEW. Comments that include the digitized position are also written to the current journal file (if open). The WHERE command can be embedded into scripts to allow interactive positioning of color keys, boxes, lines, and other annotations.