There is a create thumbnails tutorial, found in the Common Setup docs, but this one is just a wee bit different. In previous themes, you are able to check the box next to every thumbnail size that you want to create when uploading “new” images.

I should note that this is a feature in the premium version of unBlock.

With unBlock, we changed this so that only one can be selected. Ultimately, when you use the thumbnail creation feature, this will automatically crop the featured image for your blog. There are a few others that can be generated:

  • Related Posts
  • Recent Posts WidgetThis one is automatically created.
  • Full Post Featured Image

If you decide to change your blog layout with featured images that have previously been uploaded (and cropped), you can still choose the thumbnail size you want. The only thing that you need to do is to regenerate your images with a plugin, such as Regenerate Thumbnails, by  Alex Mills (Viper007Bond).

graphic for the Regenerate Thumbnails plugin

Choose Your Thumbnail(s)

Based on the blog layout (when using unBlock Premium) that you plan to use, select the corresponding thumbnail size.

screenshot for featured image sizes in unBlock

Then, you can decide if you want to enable the one for full posts and/or related posts (recommended).

screenshot showing the unBlock setting for full post featured image sizes
screenshot showing the unBlock setting to create thumbnails for related posts
  1. Go to Appearance > Customize > Thumbnail Options
  2. Look for the Blog Featured Images section and choose the options that you want.
  3. Click the Publish button.