The effect of xwiki.showviewaction should be visible almost right away. Note that URLs with the /view/ part in them will still work, and there won't be any redirection from an URL with /view/ >to an URL without it. But clicking on wiki links should point to non-/view/ URLs.
I expected after the login to have no "/view" any more in the url but it still was there?
The other two are pretty much useless... Since getting access to the configured values is hard, most of the code >doesn't take them into consideration and "Main" and "WebHome" are hardcoded all over the code. My advice is to not use those. If your goal is to change the homepage URL, then you should add a redirect inside the >existing Main.WebHome to your desired page.
I tried that one but didn't receive the expected results. I opened the page Main.webHome in the WYSIWYG-Editor and went to the coding perspecvive. There I entered "$response.sendRedirect($xwiki.getURL('Space.Page'))", but it showed me the source directly :) So: WHERE do I add this code snippet on the Main.webHome page? Best regards Florian