Good morning, this option is available in MP, but it would also be useful in Clasik. The idea is to add a template (your own selected size) to save photos. For example, I always use the 16x9 format - i.e. 1920x1080 or 500x281.
It would be very useful to add your own template - instead of entering these values manually each time. This is just my suggestion.
Adding your own template for saving image sizes
Adding your own template for saving image sizes
Classic las version of XnView