A Cursive Attachment lookup is mostly used to describe cursive scripts and other glyphs that are connected with the special Cursive anchor class.

 

Set an exit anchor for the first glyph and an entry anchor for the second one. If placed correctly the two glyphs will be connected, as both horizontal and vertical adjustment will happen. These are mostly used with Arabic.

Right to Left

Here the Right to Left option is important. If clear, the second glyph is adjusted to align anchors with the first glyph. If set, the first glyph is adjusted to align anchors with the second glyph.