Hello,
today, we've an enhancement registered for this ("Shrinking hardcopy in order to fit the size of the sheet"), but no implementation target has been set.
Actually, I was a bit surprised the first time I've been asked to implement Hardcopy feature: for me it was so obvious to alt+printscreen, go to ms paint and do whatever you want (crop the image, make annotations...).
The 2.20 feature list is already frozen.
For the future, if there is no issue to get information from the printer, it shouldn't be a big issue to implement it in a minor update version - the list for 2.21 (or whatever the name that will be chosen, you know it's not in our developer hands) is not frozen yet.
Regards,
Pierre-Nicolas