layout_ajax_form_save_dialog in core/modules/layout/layout.admin.inc

AJAX handler that saves a form in a dialog and updates the underlying form.

layout_ajax_form_save_title_dialog in core/modules/layout/layout.admin.inc

layout_block_configure_ajax_update in core/modules/layout/layout.admin.inc

AJAX callback to update the underlying layout form after updating a block.

layout_block_disable_page in core/modules/layout/layout.admin.inc

Menu callback; Set a block as disabled.

layout_content_form in core/modules/layout/layout.admin.inc

Form callback; Main form for editing a layout's content.

layout_menu_item_form in core/modules/layout/layout.admin.inc

Form callback; Configure a layout menu item.

layout_settings_form in core/modules/layout/layout.admin.inc

Render the settings form for layout.