Why a resize looks wrong or was rejected

The layout looks off at a new size#

Big aspect-ratio changes (a square design stretched to a tall story, or a wide banner) stay safe, but elements can land small or loosely spaced. Fix it in Studio: open Smart Resize, then either use Adjust Variant to nudge the layout by hand, or ⋯ → Recompose with AI for a fresh pass. Fine-tune a resized layout walks through both.

A saved size always renders exactly as you arranged it — an unsaved size falls back to automatic adaptation, so save the sizes you care about.

A size was rejected when adding it#

When adding a size in Studio:

• Width and height must each be between 10 and 5000px.
• A size that exactly matches one already in the list is skipped.
• A template can hold up to 24 sizes.

An API request failed#

• size must be a preset slug (e.g. instagram-story) or "WIDTHxHEIGHT". For explicit pixels, send width + height together instead.
• extraSizes works on image formats only — png, jpg, webp, avif. On a PDF or video format it returns an error (and it isn't supported on templates with flowing elements).

Related#