Hi Lisa, making a child theme means your changes won't be overwritten when you update the theme, since they'll be in a special protected folder. Here are some guides that will help when making your first child theme:
For your Pilcrow child theme, you'll first need to add the required style.css file to your child theme folder, following the format shown in the guides.
Next, the file we want to make changes to is header.php, so make a copy of that file and place it in your child theme folder.
What we want to do is add a bit of code to display the search form below the header graphic. The code you'll want to add looks like this:
<?php get_search_form(); ?>
Add this new line below line 58 in the header.php file, which is the line that looks like this:
</div><!-- #pic -->
This new function displays the search form - here's the Codex reference in case you're interested in reading more about it.
The last thing we'll need to do is align the search box to the right. You can do that by adding some CSS to the styles.css file in your child theme folder:
That results in something that looks like this on my test site:
Is there a way for the search box to show up in the same place on every page?
Yes, the search form will appear in the same spot on every page, since header.php is called in on every page.
Let me know how it goes!