SignFont does not employ diacritics in the traditional sense of the word. The symbols for the thumb could conceivably be analysed as diacritics but tend to be analysed either as part of the handshape symbol to which they attach or as separate symbols because they are written in-line after the handshape symbol, rather than above or below. Movement symbols are described as "accent marks", but again, they are written in the normal, linear, flow of text, so they are not analysed as diacritics.