@sumudu The problem is floating the images left or right with text wrapping around them…without doing major surgery to your theme's CSS.
In the default Casper theme, embedding..
<img style="float:left" src="/content/whatever">
Actually floats the image in the center.
<img style="float:right" src="/content/whatever">
Floats it to the right but with a MASSIVE margin.
Fixing it will require more work than I care to undertake.
If you are okay with centered images with text broken above and below, it works fine.