Changing Post Thumbnail Sizes

Vantage adds five image sizes. This page lists them and shows two ways to change them.

Image Sizes Added by Vantage

post-thumbnail
720 x 380, cropped. Used for the featured image of a post or page when the page shows a sidebar. That means the Page Layout is Default or Full Width, With Sidebar, and the Sidebar widget area has widgets.

vantage-thumbnail-no-sidebar
1080 x 380, cropped. Used for the featured image in all other cases, such as a page with no sidebar.

vantage-slide
960 x 480, cropped. Used by the Slider loop template.

vantage-carousel
272 x 182, cropped. Used by the Carousel Slider loop template.

vantage-grid-loop
436 x 272, cropped. Used by the Grid loop template.

You choose a loop template with Blog Archive Layout in Blog, or in the Post Loop Widget of Page Builder.

Change the Sizes With a Plugin

The Simple Image Sizes plugin lets you change the sizes.

  1. Install and activate the plugin.
  2. Go to SettingsMedia and find the size that you want to change.
  3. Change Maximum width, Maximum height or Cropping, and click Update for that size.
  4. Scroll down to the list of sizes to rebuild. Click the Size name box to clear all names, and then tick the sizes that you changed.
  5. Click Regenerate Thumbnails.

Change the Sizes With Code

Add this code to the functions.php file of a child theme. Vantage sets the sizes at priority 10, so the code must run later.

function vantage_child_image_sizes() {
	set_post_thumbnail_size( 900, 450, true );
	add_image_size( 'vantage-thumbnail-no-sidebar', 1200, 450, true );
}
add_action( 'after_setup_theme', 'vantage_child_image_sizes', 20 );

Change the numbers to suit your site. Use set_post_thumbnail_size() for post-thumbnail and add_image_size() for the other sizes.

Regenerate Your Images

WordPress makes the sizes when you upload an image. After you change a size, the images that you uploaded before keep the old sizes. Regenerate them with the plugin above, or with the WP-CLI command wp media regenerate.