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

Menu callback; Break a lock on a layout or menu item.

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

Handle form submission of the display content editor.

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

Submit handler for layout_menu_item_form() that resets in-progress changes.

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

Form callback; Configure a layout menu item.

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

Submit handler for layout_settings_form() that resets in-progress changes.

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

Submit handler for layout_settings_form() that saves in-progress changes.