How can I make smaller images on my Webflow portfolio pages expand to a larger scale when clicked on, like a pop-up window?

To make images expand in a pop-up (lightbox) when clicked on in Webflow, you can use Webflow’s built-in Lightbox component or create a custom interaction. Here's how to do both methods.

1. Use the Built-In Lightbox Component

• Drag a Lightbox component from the Add Elements panel onto your page.
• Replace the default image with your own thumbnail image.
• In the Lightbox Settings panel, set the Hi-Res Media to the larger version of the image you want to appear in the pop-up.
• You can also group lightboxes (for galleries) by assigning the same Lightbox group name.

This is the easiest and most optimized solution for image pop-ups, especially for portfolios.

2. Convert Existing Image to Lightbox

If you're using regular Image elements and want them to behave like a lightbox:

• Delete the static Image element and replace it with the Lightbox component.
• Reinsert your image into the Lightbox.
• Add the larger version of the image in the settings under Media Settings.

3. Optional: Use Modal Interactions (Custom Pop-up)

If you want more control (e.g., captions, animations):

• Create a div block to act as your modal (position: fixed, 100% width/height, hidden by default).
• Inside that modal, add an Image element and a close button.
• Set up an interaction: When the small image is clicked, set modal display to flex or block, then link the larger image dynamically or via combo classes.
• Set another interaction on the close button to hide the modal again.

This is more complex but gives full design flexibility.

Summary

To make smaller images expand to a pop-up on click in Webflow, use the built-in Lightbox component, which allows easy setup of thumbnail-to-large image interactions. For more customized designs or animations, use a modal with Webflow interactions.