Add supported fonts back

Author: seisman

examples/gallery/symbols/text_symbols.py

@@ -12,9 +12,10 @@
 (less than 256 characters). Optionally, you can append
 **+f**\ *font,outlinecolor* to select a particular font [Default is
 :gmt-term:`FONT_ANNOT_PRIMARY`] and outline color [Default is black] as well
-as **+j**\ *justify* to change the justification [Default is CM]. The fill
-color of the text symbols can be set with the ``fill`` parameter, and the
-outline width can be customized with the ``pen`` parameter.
+as **+j**\ *justify* to change the justification [Default is CM]. For all supported
+fonts see :doc:`/techref/fonts`. The fill color of the text symbols can be set with
+the ``fill`` parameter, and the outline width can be customized with the ``pen``
+parameter.
 """
 
 # %%