Now it is very easy to see large sized files in gmail

Pl. see 5.5. MB attached picture in this mail.
It opens as easily as any small sized picture in my gmail.
It appears that uploaded picture is automatically re-sized by gmail for easy viewing.
At the same time we can also see any enlarged size with same ease.
I think it's a great feature being offered now by gmail.
Yes. The method of showing the attachments has changed recently.
Thanks for the information about the size of images too.