When using web viewers, panorama VR or image sequences on a page, these will not be rendered when the Twixl Publisher export creates the thumbnails that are used for the Table of Contents (TOC) overview.
There is a way to customize the thumbnails that are being displayed though…
For InDesign-based content
- The thumbnails that you want to customize need to be placed in the same folder as the InDesign files for the article. If you use a publication-based workflow, it is best practice to keep both the different articles and the publication (InDesign book) file within the same folder.
- The thumbnail files need to have the same name as the article, but with .jpg as the extension instead of .indd, and have a size of 1024x1024 pixels (or a larger, preferably square, size).
- The retina thumbnails should add a suffix
@2x
to the file name, e.g.ArticleName@2x.jpg
, and have a size of 2048x2048 pixels (or a larger, preferably square, size). - For articles where no custom thumbnail has been defined, the Twixl Publisher plug-in will generate one on the fly during the Export process.
A sample folder structure should then look as follows:
Article1.indd
-
Article1.jpg
(1024 × 1024 pixels) -
Article1@2x.jpg
(2048 × 2048 pixels) Article2.indd
-
Article2.jpg
(1024 × 1024 pixels) -
Article2@2x.jpg
(2048 × 2048 pixels) MyPublication.indb
For HTML-articles
The Twixl Distribution Platform will generate thumbnails. Here are the rules you need to take in account:
- If there is an
index.jpg
file in the.zip
file on the same level as theindex.html
file, that image will be used as a thumbnail - If there is an
index.jpeg
file in the.zip
file on the same level as theindex.html
file, that image will be used as a thumbnail - If there is an
index.png
file in the.zip
file on the same level as theindex.html
file, that image will be used as a thumbnail - If no images are present, the Twixl Distribution Platform will look at the first image it can find in the HTML-file.