[slowsmile]

@Kiruhdu...The body tag with 3% margins was put in for better readability in Book View in Sigil. But if you want to change the margin settings then the only way you can do that is in the html in the following way:

After running the plugin:

* Go to the Book Browser and click on an *.xhtml file.
* Switch to HTML View
* Find the body {} tag and remove or change just the margin values for "style="margin: 3% 3% 3% 3%;" to your own preference.
* Do this for all files in the Book Browser.

....Or you can just use Sigil's Search and Replace. Search all the xhtml files for "style="margin: 3% 3% 3% 3%;" and replace it with whatever margin values you prefer e.g. "style="margin: 5% 5% 5% 5%;". You can also just remove this body styling completely using Search and Replace if you wish. You'll only need to do this once.