With the premium version of the WordPress GeneratePress theme, you can specify the size of thumbnails. However, there are times when the designated thumbnail size doesn't properly render the feature images on blog or category pages. Let's explore how to address thumbnail size issues in the GeneratePress theme.
Setting an appropriate thumbnail size can also enhance your site's loading speed. If thumbnails appear blurry, defining a thumbnail size that doubles the image dimensions displayed on your blog page (latest post page) can ensure clearer thumbnails.
Thumbnail Size Issues in WordPress GeneratePress Theme
If you are using the premium version of GeneratePress, navigate to Dashboard » Appearance » Customize » Blog, where you can set the thumbnail size and position under the Featured Images section in the Archives tab.
You can specify the thumbnail size generated under Media Attachment Size, entering specific values for Width and Height.
The Media Attachment Size section displays the media sizes currently available on your WordPress site.
You can check the default thumbnail settings in WordPress under Dashboard » Settings » Media and modify the size settings if desired.
If you set an image size that is excessively large compared to the actual thumbnail image size in GeneratePress's featured image settings, the thumbnail images loading on block pages (latest post pages) and archive pages may become unnecessarily large, negatively affecting page load speed.
Incorrect thumbnail size settings may lead to the thumbnails not appearing at the desired size on the blog page.
In this blog, we selected medium under Media Attachment Size and set the featured image dimensions to 300×150. However, since the medium-sized thumbnail is actually 300×300, some parts of it are cropped when displayed on the latest post page.
If you wish to set an exact thumbnail size, regenerating thumbnails may be necessary. Having run this blog for many years, I've found it challenging to regenerate all thumbnails, so I continue to use the current settings.
Setting the Exact Thumbnail Size
There could be reasons why a thumbnail size does not display correctly. For instance, it's rare but possible for a featured image's aspect ratio (aspect ratio) to appear distorted for certain posts.
In such cases, defining a suitable thumbnail size and regenerating all thumbnails can resolve the issue.
1 For example, if we want to set the thumbnail size to 350×200, we can add the following code to the child theme's functions file to define the new thumbnail size.
add_action( 'init', function() {
add_image_size( 'main-page-thumb', 350, 200, true );
} ); If you want the thumbnails displayed on the block page (latest posts page) and category/tag pages (archive pages) to appear sharper, consider setting the thumbnail size to double the dimensions.
add_action( 'init', function() {
add_image_size( 'main-page-thumb', 700, 400, true );
} ); Doing this will...
- Make the thumbnails appear clearly on the blog page.
- However, keep in mind that the file size of the images will increase since the dimensions are doubled.
Weighing the pros and cons, choose the code you prefer and add it to the functions file of your child theme. If you do not work with a child theme, updates to the theme may cause any added or modified code to be lost.
2 After adding the above code, use a thumbnail regeneration plugin like Force Regenerate Thumbnails to regenerate the thumbnails.
It's desirable to perform a full site backup beforehand, just in case something goes awry.
3 Once all thumbnails are regenerated, specify the newly defined thumbnail size (e.g., main-page-thumb) under Dashboard » Appearance » Customize » Blog in the Media Attachment Size section.
Your blog page and archive pages should now display the thumbnail size correctly.
Of course, if the original size of the featured image is smaller than the thumbnail size set in the blog settings, the thumbnail will appear smaller on the blog page.
If you encounter sudden issues with thumbnail size on a blog using the GeneratePress theme, the methods outlined above may help resolve them. If anything remains unclear, feel free to request assistance here.😄
GeneratePress is regarded as the fastest theme among existing WordPress themes. This blog is currently utilizing the GP theme. While you can use the free version, consider opting for the premium version for greater customization options. For more details, visit the GeneratePress theme website.