How do I enable scrolling within a popup in Webflow using the mouse wheel or trackball on devices without touchscreens or trackpads?

To enable scrolling within a popup in Webflow using the mouse wheel or trackball on devices without touchscreens or trackpads, you'll need to ensure that the necessary interactions and styles are set up correctly. Here's a step-by-step guide:

1. Create the popup: Begin by designing the popup element in Webflow. This can be achieved using a combination of div blocks, containers, or any other elements you prefer.

2. Add content to the popup: Place your content inside the popup element. This can include text, images, forms, or any other elements you want to display.

3. Set the popup to have a fixed position: In the Style panel, select the popup element and give it a fixed position. This is necessary to prevent the popup from scrolling along with the page.

4. Configure the size of the popup: Adjust the height and width of the popup to determine its size. Consider setting a maximum height and width to ensure it fits well on various screen sizes.

5. Set up the scrollable content: Inside the popup element, add a new div block and set its position to relative. This div block will be the container for the content with the scrollable functionality.

6. Customize the scrollable div: Select the div block that contains the content and apply the following styles:
- Set the height to 100% to ensure it fills the entire popup element.
- Enable scroll overflow by setting overflow: auto. This will allow the content to scroll within the div block.
- If desired, you can customize the scrollbars using the ::webkit-scrollbar CSS pseudo-elements.

7. Add interactions: To enable scrolling using the mouse wheel or trackball, you'll need to add interactions to the popup element. Here's how:
- Select the popup element and go to the Interactions panel.
- Create a new "Scroll" trigger.
- Choose "While scrolling in view" and select the scrollable div as the element to detect the scrolling.
- In the "Affect different element" section, select the scrollable div as the element to affect.
- Under "Legacy interactions", choose "Scroll into view" and set a specific scroll behavior. For example, you can choose "Scroll" or "Move".
- Customize the interactions as desired. You can adjust easing, duration, and other options to fine-tune the scrolling experience.

8. Test and refine: Preview your project to test the scrolling functionality within the popup. Make adjustments to the interactions and styles as needed to achieve the desired scrolling behavior.

By following these steps, you should be able to enable scrolling within a popup in Webflow using the mouse wheel or trackball on devices without touchscreens or trackpads.