Lightroom: Options to: Make a copy

I wish to get other options when: 
Select one/multi photos and right click - make a copy -
a small window open
make a copy
 select FORMAT: dng or jpg or tiff 
 select SIZE:  small / full / custom

The reason is that I often import as raw format for best editing, but wish to keep the photo as jpg (lighter and  reduced) and delete the original.
The jpg would be automatically save at the same place than the original

Now to do that I have to export to folder and then reimport the pic...