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-rw-r--r--extras/source/truetype/symbol/README7
1 files changed, 5 insertions, 2 deletions
diff --git a/extras/source/truetype/symbol/README b/extras/source/truetype/symbol/README
index 1c899beaf57d..c5334b6c61e7 100644
--- a/extras/source/truetype/symbol/README
+++ b/extras/source/truetype/symbol/README
@@ -1,5 +1,8 @@
-Modify the OpenSymbol.sfd and generate opens___.ttf from it with fontforge. The
-.sfd is the canonical source for the .ttf
+Modify the OpenSymbol.sfd and generate opens___.ttf from it with FontForge. The
+.sfd is the canonical source for the .ttf.
+Use TTX/FontTools, which can dump the content of .ttf as an XML file, in order
+to make sure that the resulting .ttf differs only deliberately from the original
+one.
Every new version of the font should increase the font version. This is
important so that when two versions of the font are installed, e.g. one