Arabic letter mark

It has been suggested that this article be merged with Left-to-right mark and Right-to-left mark. (Discuss) Proposed since June 2024.

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "Arabic letter mark" – news · newspapers · books · scholar · JSTOR (October 2022) (Learn how and when to remove this message)

The Arabic letter mark (ALM) is a non-printing character used in the computerized typesetting of bi-directional text containing mixed left-to-right scripts (such as Latin and Cyrillic) and right-to-left scripts (such as Persian, Arabic, Syriac and Hebrew).

Similar to the right-to-left mark (RLM), it is used to change the way adjacent characters are grouped with respect to text direction, with some difference on how it affects the bidirectional level resolutions for nearby characters.