diff --git a/libraries/SDL_gfx/slack-desc b/libraries/SDL_gfx/slack-desc
index 2a7f59f585..0ec9563473 100644
--- a/libraries/SDL_gfx/slack-desc
+++ b/libraries/SDL_gfx/slack-desc
@@ -1,4 +1,12 @@
-SDL_gfx: SDL_gfx Library.
+# HOW TO EDIT THIS FILE:
+# The "handy ruler" below makes it easier to edit a package description.  Line
+# up the first '|' above the ':' following the base package name, and the '|'
+# on the right side marks the last column you can put a character in.  You must
+# make exactly 11 lines for the formatting to be correct.  It's also
+# customary to leave one space after the ':'.
+
+       |-----handy-ruler------------------------------------------------------|
+SDL_gfx: SDL_gfx (SDL graphics drawing library)
 SDL_gfx: 
 SDL_gfx: SDL graphics drawing  primitives  and other support functions. The
 SDL_gfx: SDL_gfx  library  evolved  out of the SDL_gfxPrimitives code which