Slider images are great for, well, sliders, but not so much for Pinterest. You took the time to create a pin image that’s just right to showcase your post, and that’s the one you want people to use. Thankfully, it’s SUPER easy to hide that slider image, so that readers will see your Pinterest image and hopefully pin that one. Because the image is actually still in the post, it’s what gets pulled by the slider and shows for you preview image.
In your post, switch from Compose to HTML (I know-it makes my eyes hurt, too.)
The first line of code for your image looks like this:
<div class=”separator” style=”clear: both; text-align: center;”>
You’re going to add in display: none;
<div class=”separator” style=”clear: both; display: none; text-align: center;”>
That’s it! Now your image is there to be pulled for the slider and post preview but is not seen by readers.