This is a comparison to mavericks (10.9.5) Preview

![preview][1]

It looks like the only change is the back/forward keyboard shortcuts. Or maybe my Spanish is not up to the snuff.

I am not sure why would you try to make keyboard shortcuts that already exist.

But see this info: http://apple.stackexchange.com/q/4074/46541


And this info: http://xahlee.info/comp/unicode_computing_symbols.html

  [1]: https://i.sstatic.net/EoN80.jpg