Save document library as template option not available
Problem
The Save Document Library as Template option is not available on the default Documents library that gets created by the site publishing feature.
Cause
This is a known issue in SP 2010 and a work-around has been provided.
Work-around
Open the document library -> Library Settings
On your address bar, change the link from this:
https://sharepointsite/_layouts/listedit.aspx?List=%7BAE8E37D9%2DCC63%2D4324%2D9A78%2D97D2E5426252%7D
to this:
https://sharepointsite/_layouts/savetmpl.aspx?List=%7BAE8E37D9%2DCC63%2D4324%2D9A78%2D97D2E5426252%7D
You should now be able to save your document library as a template.