Admin Forum:Page templates?

I have been away for a long time. Now I started a new wiki. I remeber that, some months ago, in other wikis, there was an option to create a default page template, so that everyone that adds new page, only has to fill this template. However, I do not find this option now - when I start a new page, I land in the default editor. How can I find this option in the new wiki?

Also, I do not find the option of a WYSIWYG editor. In my previous wiki I asked to cancel it, but in this wiki I want this to be the default. Where do I find this option?