Right-to-left in InDesign isn't a single checkbox. It's several interacting settings — and some of the underlying problems aren't fully fixed by Adobe yet, not just misconfigured by the user.
Written by Ata Rafi, Founder and Chief Formatter at Format Fix, who builds Arabic, Urdu, and Islamic-text layouts in InDesign daily.
Request A Free QuoteThe paragraph-direction control isn't in the standard English-language InDesign interface at all — it only appears in the Middle Eastern edition, or by manually switching to the World-Ready Paragraph Composer and setting the text's character language to Arabic. A request to add it directly to the standard Paragraph panel was formally reviewed and declined by Adobe, which confirms this is intended behavior, not an overlooked setting.
This is the most common point where a DIY attempt stalls — not because the person did something wrong, but because the control they're looking for genuinely isn't where the standard interface would suggest.
These three terms get used interchangeably, but they're not the same thing — and knowing which one you actually have determines what's possible.
See Arabic Typesetting Software Explained for how these options compare from a buying and workflow standpoint, not just settings.
Whether numerals display as Arabic-Indic or European digits is its own setting, independent of paragraph or character direction — getting RTL "working" doesn't automatically fix digit order. A character-level formatting override can also silently break paragraph-level RTL settings without any visible warning in the Paragraph panel.
Each of these can be set correctly on its own and still produce a broken result if the others aren't checked alongside it — which is exactly why "turn on RTL" isn't really one action.
Getting the direction and composer settings right is necessary but not sufficient. A handful of specific, documented failure points persist even in correctly-configured files, and some of these have been acknowledged by Adobe without a full fix.
A footnote reference marker can introduce a stray character that shifts diacritics out of place relative to their letters. One user working through this described it as making correct Arabic typesetting with footnotes "nearly impossible" without a manual workaround — no complete fix has been documented.
Exporting a correctly-typeset RTL file to EPUB can strip characters that prevent incorrect letter-joining, and insert formatting tags mid-word. One documented case needed roughly 700 individual corrections across a 70-page book after export, because the file looked correct inside InDesign and only broke once converted.
A confirmed bug in a recent InDesign Middle Eastern release caused a forced line break to silently revert an RTL paragraph back to left-to-right, with no visible indicator anything had changed. It persisted across multiple releases before being patched.
See Quranic Text Formatting With Tashkeel for how diacritic precision is handled specifically for religious text, Arabic Editorial Formatting for footnote and cross-reference structure in reference-heavy manuscripts, and Bilingual Arabic-English Formatting for how direction and digit conflicts are handled when Arabic and English share the same page.
Turning on World-Ready Composer and setting paragraph direction is something a careful user can do. What's harder to catch alone is everything downstream of that: whether a character-level override quietly broke digit order, whether the file will survive EPUB export intact, and whether a footnote is misplacing diacritics that won't be obvious until the file is proofed line by line against the source text.
This is checked as standard practice on every Format Fix project — not as an extra step, but because these are exactly the failure points a one-off settings change doesn't catch. See 200+ Arabic, Urdu, and bilingual books formatted correctly for what that looks like in practice. If you're already seeing broken output, Why Does My Arabic Text Look Reversed, Disjointed, or Disconnected? covers the underlying causes in more detail.
Authors laying out their own book who hit the missing-direction-control wall before realizing it isn't a setting they overlooked.
Teams experienced in Latin-script layout encountering Arabic-specific composer and direction settings for the first time.
Files moving from a different tool into InDesign for final production, where direction and shaping settings need to be rebuilt, not assumed. See Urdu Book Formatting for the InPage-to-InDesign conversion process specifically.
The paragraph-direction control isn't in the standard English-language interface at all — it only appears in the Middle Eastern edition or via the World-Ready Paragraph Composer with the character language set to Arabic. This is confirmed intended behavior, not a bug.
Standard InDesign lacks a native Arabic paragraph-direction control. The Middle Eastern edition adds native RTL interface elements and Reverse Layout for RTL book binding, but forces a single interface language and drops Asian-script support.
Digit type (Arabic-Indic vs. European) is configured separately from paragraph direction, and a character-level formatting override can silently break correct digit order even when the paragraph settings look right. This is also a common KDP rejection cause — see Common Arabic eBook Formatting Mistakes That Get Rejected by KDP for how to catch it before submitting an ebook, or Mixed Arabic-English Text: Numbers, Names & Dates for the underlying numeral-direction rule.
No — footnote references can introduce a stray character that shifts diacritics out of place, a documented issue independent of whether RTL and composer settings are otherwise correct.
EPUB export can strip characters that prevent incorrect letter-joining and insert formatting tags mid-word, breaking words apart — a file that looks correct inside InDesign can still break once converted to EPUB.
Basic direction and composer settings can be adjusted by a careful user. Catching every downstream interaction — digit order, EPUB export integrity, footnote diacritic placement — is where DIY attempts commonly break down. Request a free quote if you're already seeing broken output.
