Microsoft Word - 'show all hyperlinks' function?

I am not sure from your question whether you are trying to remove all the hyperlinks altogether or want them showing as hyperlinks. If you want to remove, and have as normal text, then the quickest method is to use CtrlA to highlight all text and click on the Normal Style icon, or use format painter to copy the style. There is no way of easily seeing all hyperlinks at a glance unless they are entered as a field or style and then would appear if you use Doent Map view.