To add additional website slots to your IP addresses, go to your IP group and find the IP address where you wish to add additional website slots.
Check the checkbox in front of the IP address and click on the "Modify" button. A small popup will appear where you can set your IP address's new website slot count.
Please keep in mind that you can have up to 10 domains per IP address.
Additional website slots are added automatically to your IP address after paying the invoice.