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When your theme is ready:
  1. In theme.json, change the id (if you copied it from here, it must not be ejemplo), the name, the author and the version. If you can, add a preview.
  2. Remove anything the folder does not need: everything inside it is exported.
  3. Choose your theme in Settings → Appearance and press Export .ejtheme (it exports the active theme and asks where to save it). A .ejtheme is just a zip of the theme folder.
To install it on another PC: Settings → Appearance → Import, choose the .ejtheme, and it is installed and selected. Useful details:
  • It also accepts a .zip you made by hand, with theme.json at the root or inside a single folder.
  • It is installed to themes\<id>. If a theme with that id was already there, it replaces it.
  • You cannot import a theme with a built-in id (“The id «steam» belongs to a built-in theme; change it in theme.json”).
  • Limit: 200 MB uncompressed.

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What now?

  • The reference has everything: achievements (ejg.game.achievements()), collections (ejg.library.collections), statistics (ejg.stats), trailers with attachStream(), crossfading backgrounds (createBackdrop()), art that fits any frame (artFor())…
  • The built-in themes are made with exactly the same tools. Retro is the simplest and Steam the most complete. You will find them in the themes folder of the installation (usually %LOCALAPPDATA%\ejGames\themes), and Duplicate to edit (Appearance) copies any of them into your themes folder so you can take it apart.