Feature Request: Vertical Kerning without creating a new glyph

[lsyk4]

Description

Currently, there seems to be no way to apply vertical kerning. For example, it is not possible to align characters on top (or bottom) of each other, or to slightly move them upward or downward depending on their interaction with other letters.

Use Case

This feature would be useful when designing fonts that require vertical alignment adjustments between specific characters, without having to create new glyphs to simulate this behavior.

Expected Behavior

Allow vertical kerning adjustments in a similar way to horizontal kerning, so that characters can be repositioned vertically depending on the context. This would make the design process more efficient and flexible.

[johanmattssonm]

Thanks. Good idea.