Sort:  

It's a bit low-tech but you could add a link underneath an image to a larger picture stored either on Steemit or A-another location, problem is, that link still takes the reader away from Steemit and the article if they don't know or remember to right click open in a new tab.

Coin Marketplace

STEEM 0.15
TRX 0.12
JST 0.027
BTC 55213.27
ETH 2919.78
USDT 1.00
SBD 1.95