Clarify custom select styles

Fixes #26281

diff --git a/site/docs/4.1/components/forms.md b/site/docs/4.1/components/forms.md
index e55f58f4de864e94b7357ce2cfd74b6bccb1fea4..5d3a5d2b5388c71e01f5d9d1ece79f37a58e8ef1 100644 (file)
--- a/site/docs/4.1/components/forms.md
+++ b/site/docs/4.1/components/forms.md
@@ -1177,7 +1177,7 @@ Custom checkboxes and radios can also be disabled. Add the `disabled` boolean at
 
 ### Select menu
 
-Custom `<select>` menus need only a custom class, `.custom-select` to trigger the custom styles.
+Custom `<select>` menus need only a custom class, `.custom-select` to trigger the custom styles. Custom styles are limited to the `<select>`'s initial appearance and cannot modify the `<option>`s due to browser limitations.
 
 {% capture example %}
 <select class="custom-select">