Storyline 360 Tutorial

Resolving Right-to-Left (RTL) Closed Caption Alignment in Articulate Storyline 360

When localizing eLearning content into Right-to-Left (RTL) languages such as Arabic, Hebrew, or Urdu, instructional designers often encounter unexpected layout behavior. A common technical issue in Articulate Storyline 360 occurs when published Closed Captions (CC) misalign with the screen resolution, defaulting to Left-to-Right layout parameters despite player language settings.

By applying a quick post-publish CSS adjustment, you can ensure that localized Closed Captions render with correct right-aligned orientation and text flow across all devices.

Storyline 360 course preview titled 'How to implement Right to Left (RTL) alignment issue in Closed Caption (CC)' showing a Hebrew-language slide with a closed caption bar

The Challenge: RTL Text Misalignment in Captions

While standard slide elements like text boxes adapt well to RTL configurations in Storyline 360, default video and audio closed caption containers can reset text direction upon publishing. This creates two distinct problems:

  • Punctuation marks and leading words appear on the wrong side of the screen.
  • Sentence structures reverse, disrupting comprehension for native speakers.

Step-by-Step CSS Fix for RTL Captions

Follow this process to modify your published course output files:

  1. 01

    Locate the CSS File

    Open your published course output folder, navigate to the Web output directory, and locate the file named main.min.css.

    Windows File Explorer showing the published Storyline 360 output folder with main.min.css selected inside the html5/lib/stylesheets directory
  2. 02

    Open in a Code Editor

    Right-click main.min.css and select Edit with Notepad++ (or your preferred text editor).

    Windows right-click context menu with Edit with Notepad++ highlighted for the main.min.css file
  3. 03

    Update Text Direction

    Search for the CSS class declaration .caption p{display and replace it with:

    .caption p{direction: rtl; display
    Notepad++ Find dialog locating the .caption p{display CSS declaration in main.min.css Notepad++ showing direction: rtl successfully inserted into the .caption p CSS declaration
  4. 04

    Update Text Alignment

    Locate the code string text-align:center;line within the caption styling block and replace it with:

    text-align:right;line
    Notepad++ showing the original text-align:center;line-height:1.5 declaration in the caption styling block before editing Notepad++ showing text-align:right;line-height:1.5 successfully applied to the caption styling block
  5. 05

    Save and Test

    Save your changes and relaunch story.html in your web browser to verify that captions align correctly to the right margin.

Comparative Summary: Before vs. After CSS Modification

Feature Standard Storyline 360 Output Modified CSS Output
Reading Direction Left-to-Right default orientation Right-to-Left native text flow
Text Alignment Centered or left-justified lines Right-justified margin alignment
Local Representation Fragmented phrase structures Culturally accurate, legible subtitles
Published Storyline 360 course preview with the Hebrew closed caption before the RTL CSS fix
Before modifications
Published Storyline 360 course preview with the Hebrew closed caption correctly right-aligned after the RTL CSS fix
After modifications
FAQ

Frequently Asked Questions

Will re-publishing the Storyline project overwrite these CSS edits?

Yes. Exporting a new build from Articulate Storyline 360 generates a fresh main.min.css file, so you must re-apply these four editing steps after each re-publish.

Does this CSS modification impact Left-to-Right (LTR) languages in the same course?

This specific edit applies globally to the caption container. If you are building multi-lingual courses in a single package, create separate published packages for RTL and LTR languages.

Can I automate this fix for continuous integration pipelines?

Yes. Web developers can run a simple post-build Python script or PowerShell script to find and replace these string values automatically upon publishing.

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