Can't magnify images in built-in lightbox

Hi everybody.
Inside my layout, I have a simple link to a very large image, such as:
<a href="https://mydomain.com/image.jpg">My Link</a>
When I click on the link, the image correctly displays in the built-in lightbox.
Can I zoom the image in when clicking on it?
When hovering the cursor outsite the image, it transforms into a “zoom out” icon, so I wonder if a “zoom in” function exists and if it can be activated.