When writing mathematica slides I create an equation with DisplayFormulaNumberedStyle. I then add a cell tag to it. Then in the document I reference to that equation by inserting automatic numbering. Then when giving the presentation I click on that reference and it takes me to that equation. I then want to go back to the point where I clicked on that reference. I was wondering if there is any way to go back without having to simply click next slide until I get there. It would be very useful if there was some kind of "back" button like in a web browser or pdf displayer.
On a Mac you can go to the top menu Windows > ShowToolbar and add a toolbar to your notebook. This has a "back" button:
Note that the toolbar goes away when the slideshow is in fullscreen mode.