2.7 Admin Page -> Appearance -> Editor -> Stylesheet(style.css)
and change the max-width value of
.entry a img {border:1px solid #ddd;max-width:800px;padding:2px;}
that’s what i did.
maybe it was a different problem which i had before
go to theme editors and change the value of ‘.entry a img’ or something like that in Stylesheet(style.css). it worked for me.
using export and import function would be better, i guess
