Hi kamhang,
Thank you for your purchase.

You don't need to hide it with CSS you can hide it on Data source and main settings each table tool separately. Please take a look at image from the attachment.

Hi kamhang,

Can icon "column" only shows columns which i select visible?
- No by default but you can hide them with CSS. Please send me a link of your table and I will provide you example how to hide it.

Besides, when i click "Filter in form" under "additional setting", the web page also shows those columns name which i didn't tick"visible", how can i fix it?
-Same as above. You can hide it with CSS or you can uncheck "Filter in Form" and then filters will be above or below every column (It depends how you define on wpDataTables settings page) and filters of unvisible columns will not be displayed.

Hi kamahang,

You can hide relic_taxonomy_category and ID columns from columns visibility button by adding this CSS on wpDataTables settings page in wpDataTables Custom CSS field:

#top > div.dt-button-collection > a:nth-child(9){
    display: none !important;
}
#top > div.dt-button-collection > a:nth-child(10){
    display: none !important;
}

You can hide these two filters by adding this CSS:

#table_1_8_filter_sections{
    display: none !important;
}
#table_1_9_filter_sections{
    display: none !important;
}

Hi kamhang,

You are welcome. We'd greatly appreciate it if you could take a minute and leave a review on CodeCanyon on this link. Thanks!