Unfortunately this isn’t possible without at least a little bit of code, but it doesn’t have to be too painful. Give this a try:
- Install and activate the Jetpack plugin on your site
- This will add a new Jetpack menu to your dashboard. Go to Jetpack > Settings then look for the ‘Custom CSS’ option and click on it’s activate link
- This will now add a new ‘Edit CSS’ option under your appearance menu. Go to this page then paste this code into the editor window (you can leave out my comment at the top). Click the save stylesheet button.
…and that’s it, your titles should now sit below the pictures instead of overlapping. I will just add that if you’re feeling more ambitious it would be fairly simple to make this into a simple child theme of your own, but I believe you will find the way I’ve listed above simplest.