How many items can be identified in the legend?

Stata will only allow four variable names in the legend. This feature is hard-coded into Stata and cannot presently be changed. An alternative is to use a graphics package to edit the graph and insert more symbols and text into the legend. See the FAQ “How can I edit a Stata graph in MS Word” for instructions.

There is also a user-written program by Nicholas Cox, Durham University, UK, called keyplot, that allows more than four items on the legend. You can download this program using the net search command:

 . net search keyplot
 (contacting http://www.stata.com)

 3 packages found (STB listed first)
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 keyplot from http://fmwww.bc.edu/RePEc/bocode/k
     'KEYPLOT': module to generate scatter plot with keys in user-chosen
     positions / keyplot produces a standard scatter plot with between one and
     ten / y variables and one x variable, except that it attempts a more /
     flexible approach to placing symbol keys for the y variables, / either in

 ordplot from http://fmwww.bc.edu/RePEc/bocode/o
     'ORDPLOT': module for cumulative distribution plot of ordinal variable /
     ordplot produces a cumulative distribution plot for an ordinal / numeric
     variable ordvar. The cumulative probability is plotted on / the y axis and
     ordvar is plotted on the x axis. ordplot is / designed primarily for data

 pwploti from http://fmwww.bc.edu/RePEc/bocode/p
     'PWPLOTI': module to plot power curve for sample size and power 
     calculation / pwploti plots statistical power on the Y-axis and the
     required / sample size of on the X-axis. Several lines can be plotted on /
     the power curve, each one corresponding to a value of difference /