ckeditor5_settings_form in core/modules/ckeditor5/ckeditor5.admin.inc

Editor settings callback; Provide options for CKEditor 5 module.

filter_editor_image_styles_settings_form in core/modules/filter/filter.admin.inc

Subform constructor to configure the text editor's inline image styles.

filter_format_editor_image_form in core/modules/filter/filter.pages.inc

Form callback: Display a form for inserting/editing an image.

ImageAdminStylesUnitTest::testDefaultStyle in core/modules/image/tests/image.test

Test to override, edit, then revert a style.

ImageAdminStylesUnitTest::testNumericStyleName in core/modules/image/tests/image.test

Test creating an image style with a numeric name and ensuring it can be applied to an image.

ImageAdminStylesUnitTest::testStyle in core/modules/image/tests/image.test

General test to add a style, add/remove/edit effects to it, then delete it.

ImageStyleFlushTest::testFlush in core/modules/image/tests/image.test

General test to flush a style.

image_style_flush in core/modules/image/image.module

Flush cached media for a style.

image_update_1001 in core/modules/image/image.install

Convert available database image styles to configuration files.

image_update_1002 in core/modules/image/image.install

Drop image tables that were converted to configuration files.

image_update_1003 in core/modules/image/image.install

Add labels to all available styles.