SharePoint 2010 enable workflow

參考 http://technet.microsoft.com/en-us/library/cc262348.aspx

To activate a workflow for a site collection

1. Verify that you have the following administrative credentials:
   • You must be a member of the site collection administrators group on the site collection that you are configuring.
     
2. On the top level of the site collection, on the Site Actions menu, click Site Settings.
3. On the Site Settings page, in the Site Collection Administration section, click Site collection features.
4. On the Features page, click Activate next to the workflow feature that you want to activate.
   The Status column displays “Active” to indicate that the feature is now active.