I want to place the search input field into the header like it`s done in standard protostar Template.

How to do this?
As a beginner, everything here looks complicated - but has an easy solution.
I hope in a few weeks I can concentrate on the content of my site...

Hello Robert,

As you can see the module map here : nuevvo.com/documentation/commercial-templates/item/40-nublog-documentation

There is only the menu position and the menu position on the header. What you can do is open a new position in your index.php if you do not want the search button to appear next to the menu.

New module code:
This should be placed in index.php around line 59 (After an <?php endif; ?>).

Then you should send me a link so I can assist you with the stying.

Maybe it would be better then to place the search-field beside of the main menu links. But there is not enough space I think. I sent you an email. Please have a look.

Once you have installed the new version publish a search module at the nuBlog_Header position.

I want to place the search field in the upper right header corner.
When I try it like you described it`s just centered and too big...
Maybe you can assist a few seconds... ;)

Sure thing.

You need to move the nuBlog_Header position above the entire logo area.

Then use some css to align in to the right and reduce that large gap.
The second line reduces the size of the search box.

real fast...

But now I have 3 or 4 search moduls. Can I erase the 3 others without any problem?

Another with it:
If I search for a term, e.g. "gold" the system marks the word "old" in search results...
it`s not that important but if you have time you can have a loo for it.
Maybe this happens to other users, too.

Yes you can safely unpublish all other search modules. The header position is not chained with any other position.

Now for the com_search, I can verify this behaviour, it is not a CSS issue and indeed both Gold and old are highlighted. I do not think this is a bug. I think this is how com_search behaves.

Is com_search the original joomla-search component?

Yes.