Permalink under Settings menu? Where is it?

pascuatj,

If I am correct, it sounds like you want to change the slugs of a particular page rather than permalinks. This guide explains how to change your page slug.

But basically, go to All Pages, hover over the page you want and click Quick Edit. There it should, in your case have presentations-3 under slug. Change it to presentations and hit Save.

If it doesn’t work, it may mean you still have the old presentation pages in your Bin. Under where it says Pages at the top, you’ll see an option for Bin, click that, go there and delete the old pages. Then re-try the steps above.

Grant.