Drag and drop the purchase to the form in the Advanced section.
![](https://glidecampaign.com/wp-content/uploads/2023/05/Image1_Bae4P9xq-1024x464.webp)
Inside the Purchase setting, go to edit, which shows the side menu along with the Credit Card details.
![](https://glidecampaign.com/wp-content/uploads/2023/05/Image2_Z67fYUnE-1024x458.webp)
Select the User-Defined Amount from the different purchase settings.
![](https://glidecampaign.com/wp-content/uploads/2023/05/Image3_x3ob0rFn-1024x460.webp)
Add the User-Defined Amount along with the One Time or Monthly Subscription.
![](https://glidecampaign.com/wp-content/uploads/2023/05/Image4_wUntLB92-1024x466.webp)