Hide the sidebar in the registration form

There are two parts of an affiliate sign-up form: the left side with smaller width is for your brand name and the program sub-main heading; the right side is the main part which contains your brand logo, the program main heading as well as the program details and fields. You can customize to hide the sidebar in specific cases following these steps:
1. Go to Settings > Registration form;
2. Click the Custom CSS tab and add the following code:
#left_side{ display:none; } #signup_form{ width:100%; }
3. Click Save changes to update.
Then the Affiliate registration form would look like this: