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Using the site tree (on the left side of the screen) right click on the navigation page that this HTML page is to come under, select create and from the drop down menu select HTML page.
The HTML build wizard step 1 - Start should now display.
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Once all fields have been completed, click on next
The HTML build wizard step 2 - Body should now display.
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Once all fields have been completed, click on next.
The HTML build wizard step 3 - Related should now display.
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Once complete, click on next.
The HTML build wizard step 4 - Categories should now display.
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Once complete, click on save.
This HTML page has now been created.