Let’s say that you’ve created a custom list in SharePoint 2007 and now you want the columns that you’ve added to be available when a new item is created or when items are edited. How do you go about doing this?
Open your list settings. Click on “Advanced Settings” under the “General Settings” section. From there ensure that “Allow management of content types?” is set to “Yes” and click OK. Back at your general list settings page you can now see a heading for “Content Types.” Click your content type (in my case “Project”) and you will see a listing of the columns available for the content type. Under the “Columns” heading you can click the link “Add from existing site or list columns” and add in your custom columns. These columns will now appear in your new item and edit forms!
