Adding the order number of an image as an overlay

[Samoreen]

Hi,

In my photo club we use to discuss photos by looking at galleries. In order to easily designate a particular photo during the discussion, we usually use the “Show cell number” option in Lightroom when building the gallery. Like this :

Now that we are moving from Googles Sites to WP + Astra Pro + Elementor Pro, we no longer have this possibility built-in. So, I'm looking for a way to achieve something similar with the Elementor gallery.

Any idea ?

Thanks in advance.

Patrick