Formatting of all pages is done by style sheet and they are all HTML5 conformant.

As a leftover from the initial version of these pages, they are only 730 pixels wide and divided into columns. The left margin is 160 pixels wide and fixed to show the menu independent of scrolling. After 10 pixels spacing follow 560 pixels scrollable content, mostly divided into a tag and a text column. This page is a good example.

Main means of navigation is the menu on the left margin. You can reach the main page and all direct subpages. To the main page and some subpages, there are sub-sub pages referred to only by a link in the text.

At top and bottom of each page there is a  light grey navigation bar  by which you can reach most of the respective super-, sub-, and neighbour pages. Even if your browser should show descriptions of the symbols in the navigation bar (when the mouse pointer is hovering over them), here they are:

main page (level 0)
superpage (level 1)
first subpage (level 1 or 2)
previous page (same level)
next page (same level)
viewing hints (this page)
legal information
keyword search
site map

Pages that are not reachable by menu or navigation bar are still reachable not only by their links in the text. There is a site map which gives a pretty good overview of all pages of this site.

The current browser versions will show help items, especially descriptions of the choices (links) in the menu, in navigation bars, image maps, and the site map. Just point with the mouse to an item.

We try to set a font for these web pages. If your browser will not show it, you may set Verdana, Arial, Helvetica or a similar sans-serif font as the variable width browser font for good-looking pages.

We set suitable link colours and deactivate link underlining in your browser for better readability (as we understand it).

Links not used so far are in light red, links visited before in dark blue. Active links you're just viewing are in medium blue, and links the mouse pointer is hovering over or that have gotten the window focus by moving with the tab key are in pure red.