Hi!
In case you have the options drop down in “block” display mode, then some of the styles (like background, font color etc..) will not apply, as it’s better inherited from the theme – and users usually prefer changing that via custom CSS with the theme styles.
You can try the following CSS if you want to add border to the whole area:
[html].searchsettings {
border: 1px solid #e6e6e6 !important;
}[/html]
or for individual fieldsets:
[html].searchsettings fieldset {
border: 1px solid #e6e6e6 !important;
}[/html]