Document should be checked in by default when uploading documents, unless you are uploading multiple documents and have columns that require data and no default value is set.
You can check in multiple documents at once using the site manager page. If you have a site with publishing features enabled, you can get to this page by clicking Site Actions > Manage Site Content and Structure. If you have a site that does not have
publishing features enabled you can navigate to that page by going to http//yoursite/_layouts/sitemanager.aspx
I hope this helps.
Planet Technologies ||
SharePoint Task Force