Because SmartFrames are rendered using <canvas>, they are not readable by search engines.
This allows for a small customized thumbnail – that is, a small JPEG generated from the original image – to be served in its place in image search results.
You can adjust the maximum size of the thumbnail that will appear in image search results. There are three thumbnail widths to choose from: Small (200px), Medium (400px) and Large (600px).
You can also choose whether to have a watermark over the thumbnail to further protect your image.
These settings are global and apply to all your embeds. This also means that if you disable search engine indexing, none of your SmartFrames will be indexed or visible in image search results.