Insert an image without external webspace

Add it as an attachment. ( gif, jpg, png )
Then edit this entry (modify) and add an image to this link:
(copy link location)

sot.jpg

Sorry for abusing this as a "tutorial" ;)

http://forum.arduino.cc/index.php?topic=338414.msg2333156

The old software used to do that for you. It remains to be seen if that's ever going to be fixed.