I was going to show you how to do this manually, but I found a way to do it in the API. If you aren’t using a repeater, you are going to have to do this to every image on the page manually; if you are using a repeater, then it will do the work for you:
Step 1: Click on the image you want to zoom in, then in the coding area, click on onClick().

Add the event to the code.

Step 2: Add this line of code in the code that popped up:
export function myimage_click(event) {
// This function was added from the Properties & Events panel. To learn more, visit
// Add your code for this event here:
$w("#myimage").clickAction = "magnified";
}
That’s pretty much it. ALSO,
if you want it to zoom in, use:
$w("#myimage").clickAction = "magnified";
if you want a window to pop up with the image in it, use:
$w("#myimage").clickAction = "expand";