Log in
Select your post
Click on the picture. It will shade over with blue and an icon will appear on the left side.
Click the LEFT one - not the red one.
This Dialog box appears:
Click the Alignment choice, Left
If you want more space around the picture, click the Advanced Settings tab and click in the Vertical space and horizontal space boxes and enter a value between 1 and 20 (pixels)
Scroll down and click the Update button.
Finally, click the blue Update button in your main post screen:
Done!
