Hi @ytsejam23,
Glad you reached out! Happy to help with this one.
The classic template loads in an iframe, to make them more resistant to changes made in the theme’s CSS. That’s helpful for avoiding theme conflicts, but makes customizing the style of them a bit more difficult. There are two PHP code snippets in our Snippet library that will help with that process.
The first is for small changes, and adds some style inline to the donor dashboard or the multi-step donation form: https://github.com/impress-org/givewp-snippet-library/blob/master/form-customizations/css-customizations/style-givewp-iframes.php
On that one, you modify lines 16-26 with your own CSS to resize the iframe.
The other is for enqueueing your own CSS completely via a custom stylesheet: https://github.com/impress-org/givewp-snippet-library/blob/master/form-customizations/css-customizations/enqueue-style-for-givewp-iframes.php
If you need assistance implementing custom PHP code on your website we have this guide:
https://givewp.com/documentation/resources/adding-custom-functions-to-your-wordpress-website/
Please note that this code snippet is provided as an example of how you can extend GiveWP with code. It’s up to you to implement and customize to your liking. We cannot provide support for custom code on your website, only the code that we create and distribute.
Feel free to reach out to us if you have any further inquiries or require additional assistance. We’re always happy to help!