Comment on `FT_GlyphSlot_Slant'.
diff --git a/include/freetype/ftsynth.h b/include/freetype/ftsynth.h
index a1277ca..5d19697 100644
--- a/include/freetype/ftsynth.h
+++ b/include/freetype/ftsynth.h
@@ -73,7 +73,9 @@
FT_GlyphSlot_Oblique( FT_GlyphSlot slot );
/* Slant an outline glyph by a given sine of an angle. You can apply */
- /* slant along either x- or y-axis. */
+ /* slant along either x- or y-axis by choosing a corresponding non-zero */
+ /* argument. If both slants are non-zero, some affine transformation */
+ /* will result. */
FT_EXPORT( void )
FT_GlyphSlot_Slant( FT_GlyphSlot slot,
FT_Fixed xslant,
