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Adding starting text to a column field

Posted By:      Posted Date: September 01, 2010    Points: 0   Category :SharePoint
I am wanting to know if there is a way you can add starting text within a field that displays within a page layout?  I have a page layout that has a field (column) called 'page summary'. What I want to do is when a content managers creates a new page based on that page layout, the text "This page contains a public notice" is automatically inserted in the page summary field and the content manager can continue typing or highlight the text and remove it. Kind of like adding a base 'Text Value' to the field (column).  I want to be able to do it without having to do custom code though.

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