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Update previews_configuration.adoc #1296

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Jun 5, 2024
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Update previews_configuration.adoc #1296

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Update previews_configuration.adoc
jnweiger May 12, 2024
da96b4e
small fixes
mmattel Jun 4, 2024
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14 changes: 14 additions & 0 deletions modules/admin_manual/pages/configuration/files/previews_configuration.adoc
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Expand Up @@ -192,6 +192,20 @@ The example below adds the preview provider for `SGI` and `HEIC` images:

NOTE: You have to add all default providers if you do not want to disable them.

=== Maximum Image Dimensions

Images up to a certain size feature preview generation (thumbnails and media viewer renderings). Images above that size show a default icon.
The default value is defined in `config/config.sample.php` as `6016x4000` which is sufficient for 24MP landscape images.

The following example would change the limit so that 24MP portrait images also feature preview generation:

[source,php]
----
'preview_max_dimensions' => '6016x6016',
----

NOTE: The dimensions here limit the size of the original image (input to the preview generator). A setting below limits the size of the generated preview images (output). For more details see the xref:configuration/server/config_sample_php_parameters.adoc#define-the-maximum-dimensions-of-the-original-image-for-preview-generation[Define the maximum dimensions of the original image for preview generation].

=== Maximum Preview Size

There are two configuration options for setting the maximum size (in pixels) of a preview. These are `preview_max_x` which represents the x-axis and `preview_max_y` which represents the y-axis. The default value you can reference in `config/config.sample.php` is set to 2048.
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