- Insert Kashidas skips the characters of a warichu block.
- Blocks whose characters the bidi order draws in turn keep where each
block starts.
- A click on a block line goes to that line's characters.
- Digits marked Warichu in vertical type on a path stay across the column.
- A block of several fonts gives its line the tallest ascent and the
deepest descent among them.
- Warichu Settings on characters not marked Warichu do not split shaping.
- Warichu Settings leaves a value outside its range as it is unless it is
edited.