# An additional kern function

**URL:** <https://forum.high-logic.com/t/an-additional-kern-function/2398>\
**Category:** FontCreator - Support\
**Created:** [February 3, 2009, 6:00am UTC](https://forum.high-logic.com/t/an-additional-kern-function/2398 "2009-02-03T06:00:43Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Pakicetus](https://forum.high-logic.com/letter_avatar_proxy/v4/letter/p/e0b2c6/32.png) [@Pakicetus](https://forum.high-logic.com/u/Pakicetus)\
**Post date:** [February 3, 2009, 6:00am UTC](https://forum.high-logic.com/t/an-additional-kern-function/2398/1 "2009-02-03T06:00:43Z")

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Would there be some way to add a feature that could let a font tell a key to convert one glyph into another glyph? For example, imagine having a font tell the word processor that putting an apostrophe after an s would automatically convert it into a ß. (s’ = ß) Or one could put an h after a t to automatically convert “th” into an Old English “eth” glyph.

This feature could allow keys such as ‘, -, or [ to be used effectively as auxiliary shift keys, and this would be quite useful for creating keyboard-ready syllabaries. In my estimation, one could even use this feature to create a Mayan script that one could type in almost entirely with a keyboard.

Thanks.

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**Author:** ![Bhikkhu\_Pesala](https://forum.high-logic.com/user_avatar/forum.high-logic.com/bhikkhu_pesala/32/9411_2.png) [@Bhikkhu\_Pesala](https://forum.high-logic.com/u/Bhikkhu_Pesala)\
**Post date:** [February 3, 2009, 6:37am UTC](https://forum.high-logic.com/t/an-additional-kern-function/2398/2 "2009-02-03T06:37:56Z")

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There already is such a feature called [OpenType Glyph Substitution](https://forum.high-logic.com/t/adding-opentype-features/1904/1). FontCreator has supported OpenType Features since version 7.0

Serif PagePlus X5 or later versions support OpenType features, as do DrawPlus, Microsoft Word, and InDesign.