Islemag powered by WordPress

Hello @gyoby

To remove the “Islemag powered by WordPress” from the footer at first you need to add the Custom CSS though the plugin.

You can find many plugin to add custom CSS. Below link is the reference for one of the plugin.

Custom CSS

After installing the plugin you will find the custom CSS in Admin Panel / Appearance / custom CSS.

Here copy and paste below CSS

.col-md-4.col-md-pull-8.powerdby {
    visibility: hidden;
}

Hope this will resolve your issue.

Best Regards!!