The "Indiana Marriages, 1811-2007" collection is available through the Historical Records section on FamilySearch. (Hover over the Search tab, then click on Records. You'll find a link to "Browse all published collections.") When you get into the collection, you can click "Browse through images," which will give you a list of the counties that are included. As of October 2017, it includes 70 of Indiana's 92 counties.
But there are other digitized records available on FamilySearch. To find them, go through the Catalog. (Click on Search, then click on Catalog.)
For best results, type the name of the county, pause, and then select the place from the list of choices that will appear. (If that doesn't work, type in United States, Indiana, <name of county>.)
Grant County isn't included in the "Indiana Marriages, 1811-2007" collection, but when you go into the FamilySearch Catalog and search for Grant County, you'll see several listings under the subject heading "Vital Records." Two of them are from the Grant County Circuit Court:
- Marriage licenses, Grant County, Indiana, 1840-1919 and Returns of marriages, 1882-1946
- Marriage records, Circuit Court, Grant County, Indiana, 1831-1955.
The camera icon with the key over it means that these records have been digitized, but can only be viewed from a Family History Center or from a FamilySearch affiliate library. Family History Centers are free to use, but sometimes have limited hours. If your local Center isn't open when you're available to do research, check to see if your local public library is an affiliate.