···51515252### `InsertLetter`
53535454-`InsertLetter(frame: Frame, letter: string, index: number)` → `Frame`
5454+`InsertLetter(listFrame: Frame, letter: string, index: number)` → `Frame`
55555656Inserts a new letter (`Frame`) into the `listFrame` at the specified index.
5757Adjusts `LayoutOrder` of subsequent letters.