When previewing the slides in the bowser, by a team mate or in the overview and then need to find the code of that slide, I would go with VSCode extension treeview.
But that does not show the slide number, so I need to "find" the title which means I need toread all the titles which is harder than finding a ordered number.
Please add the number of the slide to the treeview as well.
E.g:
