This is a special feature that is only needed if you have so much store traffic that it causing too much stress on the server CPU. Don't use it unless you have determined that you have to.
If you are using, then you need to specify all of the image sizes that you have applied throughout your store, such as in the product list settings. Those image sizes can either be single-sided or two-sided... and so the help text example is showing a combination of the two possibilities.
However.. again - Don't use this unless you have found that you must use it,
Regards
Rob
If you are using, then you need to specify all of the image sizes that you have applied throughout your store, such as in the product list settings. Those image sizes can either be single-sided or two-sided... and so the help text example is showing a combination of the two possibilities.
However.. again - Don't use this unless you have found that you must use it,
Regards
Rob