Add a Custom Link and set the URL as #. Using # will prevent the page from refreshing when you select the tab.

awesome.

Cheers, the tip about the drop-down menu help. It was what I was looking for.

Is there some way of making the topmost menu-item (the parent) do nothing, like a blank link...

To create a categories menu I now added a link (to the home page) called it "categories" and I then added all my categories as submenu-items. However, the parent menu Item is a link. Can I make it something else? Just text? ..

Thanks, Eirik

You should see a Categories panel on the Custom Menu screen.

If you don't see the Categories panel, you can click on the Screen Options tab in the upper right and there is a checkbox to enable the Categories panel.

If you want to create a drop-down menu, you need to create sub-menu items by following the instructions here.

I hope this helps!

In the description of "the columnist"- theme, it says:

The Columnist provides a single navigation menu which displays at the top of your site. This menu will support any level of dropdowns and can be configured by visiting the Appearance

When I try to manage the menu it says:

Your theme supports 1 menu. Select which menu you would like to use.

I can only add links, pages and posts to my menu. How can I get change this behaviour?

I would for instance like to add a menu item Categories with a drop down of all categories..

Cheers,
Eirik