I'm working on a History Control Version of a web app. It will be kind of Time Machine style, where you can move a slider to go from past to present (or the other way too) and immediately see an image of that version.
Now the question is about the slider. Logically for me is that the slider should be horizontal going from left to right to go from Present (at the left) to Past (at the right). But when I see Time Machine (apple) they use vertical slider (see image) where the present is at the bottom.
What are your thoughts about this? Does it really matter? And what are your thought about -if the slider is horizontal- the present is at the left and past in the right, and -if slider is vertical- the present is at the bottom.