Document `ButtonFormField`

diff --git a/docs/php/api/form_builder/form_fields.md b/docs/php/api/form_builder/form_fields.md
index 88363a530a086077b656d568ce9c29a6973ca440..3f60deaa5dd74263967237d7d28577b658c2a547 100644 (file)
--- a/docs/php/api/form_builder/form_fields.md
+++ b/docs/php/api/form_builder/form_fields.md
@@ -207,6 +207,16 @@ A category name of `null` signals that no category filter is used.
 The relevant database object action method is expected, based on the given ACL object type id, to save the ACL option values appropriately.
 
 
+### `ButtonFormField`
+
+!!! info "Only available since version 5.4."
+
+`ButtonFormField` shows a submit button as part of the form.
+The class implements `IAttributeFormField` and `ICssClassFormField`.
+
+Specifically for this form field, there is the `IsNotClickedFormFieldDependency` dependency with which certain parts of the form will only be processed if the relevent button has not clicked. 
+
+
 ### `CaptchaFormField`
 
 `CaptchaFormField` is used to add captcha protection to the form.