Hi Swarf,
in order to help you further, it is important that you provide more information.
1a. What is your wayfinder call? (show us the code of how you are calling wayfinder) e.g.
[[Wayfinder? &startId=`0`]]
1b. Where have you placed your call (template? within a document?)
2. What are the chunks (templates) you are using for your wayfinder call? (paste the chunks here) e.g.
<ul> [+wf.wrapper+] </ul>
3. It may also be helpful to see your CSS file, though this may not be initially necessary.
4. Please clarify the following:
Works fine, but only on startup page.
Do you mean your home page or the page which first contains your wayfinder call?
But after clicking on a menupoint without child documents there’s no longer a menu.
Do you mean that the menu disappears from the page/there is no navigation?
Clicking on a menu element with child-docs it displays only these child in a horizontal list.
How do you want them displayed, vertically?
5. If you have a link to your site/test site, you can post it so we can have a look.
6. Finally, have you read the wayfinder documentation?
cheers/k