watch labels

By default, labels are always generated for the target "watch mouse". You can turn labels on for other watch targets using the command set style watchpoint labels or by specifying a label as part of the watchpoint target in a plot command.

The default label text is "x : y", where x and y are the coordinates of the point, formatted using the current settings for the corresponding axes.

Example:

     set y2tics format "%.2f°"
     set style watchpoint labels point pt 6
     plot FOO axes x1y2 watch mouse

You can provide a customized label for each watch target, either as a string constant or via function that returns a string.

Examples:

     set style data lines
     plot FOO watch y=50 label "50" watch y=100 label "100"
     f(x,y) = 2*x - y      # f(x,y) = 0 defines a sloping line
     plot $CONTOURS using 1:2:3 watch f(x,y) = 0 label sprintf("%.2f",z)

Each watchpoint label is placed in a textbox. See set style textbox.