It must have slipped through while joining the forum, or I am just a bit dumb...

There is more information to put in my profile than there is now. But I cannot find the place where to edit my own profile and add that information. Please give me a hint! Thanks!

Bert,

The link is easy enough to miss. To edit yoru profile when you are logged in look at the top left of the page in the green area of the masthead.You should see "Signed in as ..." (replace ... with your userid) Click on that to view and edit your profile.