You may wish to set a different form as your permanent/default form used by Instant Predictive Opt-In.
If you wish to make a temporary change, we recommend scheduling a form. The instructions for this are here.
Step 1: Proceed to your Instant dashboard and click on Predictive Opt-In in the sidebar.
Step 2: Click on Configuration in the top right.
The remaining steps will differ based on the form provider you are using with Predictive Opt-In.
Klaviyo Integration.
Follow these remaining steps if you are using Klaviyo Forms with Predictive Opt-In.
Step 3: Modify the default form IDs for Desktop and Mobile.
Update the form IDs in the fields highlighted in red below with the Klaviyo Form IDs that you now want to use with predictive opt-in. If you use the same form ID for desktop and mobile, add your form ID to both fields.
Once done, click save! 
Alia Integration.
Follow these remaining steps if you are using Alia with Predictive Opt-In.
Step 3: Copy your Trigger ID.
Copy the default trigger ID from the field highlighted in red below. This ID will be used by Predictive Opt-In to programatically trigger your Alia pop-ups.
Step 4: Add your Trigger ID to your Alia Campaigns.
Alia only supports showing one campaign to a user at a given time, so one Trigger ID can be used across multiple forms, as long as it is only applied to one desktop and one mobile form simultaneously.
After opening the campaign and pop-up you wish to use with predictive opt-in, remove all triggers underneath your "Secondary Popup" and click on "Show Advanced Options". Enter your Trigger ID into the relevant field.
Step 5: Remove your Trigger ID from your old Alia Campaigns.
To ensure that Predictive Opt-In is triggering the correct forms, navigate to your old campaigns and ensure that the trigger ID field is empty.
Predictive Opt-In will now open the new forms!