</b></h3>
<p align="left">There are a few symbols, generated automatically by drawing plots or at Ferret run-time. Those are shown like all symbols by SHOW SYMBOLS, and their values can be used in scripts, but they cannot be directly redefined by the user.  These are listed here.</p>
<p align="left">In addition PPLUS defines a number of global symbols which are available to the user. They are documented in the chapter "Customizing Plots", section <a href="../customizing-plots/SPECIAL-SYMBOLS.html" title="6