Registers an image size for the post thumbnail.
has_image_size
Check if an image size exists.
add_image_size
Register a new image size.
image_downsize
This filter is documented in wp-includes/media.php
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image_downsize
Scale an image to fit a particular size (such as ‘thumb’ or ‘medium’).
editor_max_image_size
Filters the maximum image size dimensions for the editor.
image_hwstring
Retrieve width and height attributes using given width and height values.
image_constrain_size_for_editor
Scale down the default size of an image.
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wp_get_additional_image_sizes
Retrieve additional image sizes.
media_upload_tabs
This filter is documented in wp-admin/includes/media.php