Every image in a set is locked to the same square canvas. Multi-image grids crop toward the centre, and mixing ratios makes the crop unpredictable.
Carousels are a document-post format. Platforms that cannot render a PDF need the four-image cut from the Image set tab instead.
Remembers your platform, focus area and footer tag in this browser only.
Feed thumbnail, 150px. If you can't read it here, it fails.