Right bounds (rtbd) feature

[RicardGarcia]

Hey there,

For a project I'm working on I've come to a situation in which in order to avoid making a lot of kerning pairs I might need to use feature classes in order to add space between them. While reading the specs for OpenType features I've come to these particular ones:

· Left bounds (lfbd).
· Right bounds (rtbd).

The point is that I've never seen these in use or a line of text using them so I don't know exactly how they are supposed to be set. Any help?

Thanks a lot!

[frederik]

its been described here https://docs.microsoft.com/en-us/typography/opentype/spec/features_ko#lfbd

You can use pos in an feature to position a character or a pair (like kerning) or even contextual move characters around.