The width of the sf_colsOut sf_1col_1_100 div, which is keeping the information, is changed to 800px. Please review the screenshot
. If you want to change the width of the PublicWrapper div you need to change the backend theme of the project. You can use the default backend theme (located in a .zip file in the SDK) and change the css. Then you should register it as a Custom backend theme in Administration
Please refer to this forum thread
for further reference.
The other option that you have is to use a CSS widget, place it on the page and change the width of the div using its class PublicWrapper. Please not that you should use !import to override the default css.
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