Hello @hs1972
Thanks for writing to us.
You can overwrite slider CSS with your CSS by adding it in following option.
WordPress Dashboard => Smooth Slider => Settings => Basic Settings tab => Miscellaneous => Custom Styles => Put your CSS and do not forget to use !important tag to your CSS properties. Save changes.
You can create your own skin as well.
To create new skin in Smooth Slider you have to create folder inside smooth-slider=> css => skins folder with your skin name, and inside that 3 files are necessary i.e. functions.php, settings.php and style.css
In functions.php file you have to create all function and array name with your skin name.
for exampale, in default skin functions are like
function smooth_post_processor_default
you need to change function name with your skin name(replace default) like,
function smooth_post_processor_newskin
if you are taking reference from default skin’s functions.php then only change name “default” with your skin name.
In settings.php you need to change array name. It should with your skin name.
Let me know if it helps.
Thank you,
Regards,
Sagar.