This is the default argument for the Find command, which means you do not need to use the NAME keyword before it (unless you are searching for a word which is recognized as another argument keyword).
Specify the filename or wildcard pattern to search for. To automate the Find Files function you must specify both the NAME argument, and the location to search using the IN argument.
The NOWILD, ANYWORD and NOPARTIAL arguments can be used to control whether or not wildcards, "any word" or partial matching are used when searching names, similar to the checkboxes in the UI.
You can start the wildcard pattern with regex: to use regular expressions instead of wildcards. (Do not specify the NOWILD argument in this case.)
You can also search using a pre-defined filter by providing the filter name for the NAME argument and also specifying the FILTER switch.
Example: Find *.(doc|txt|bmp) IN C:\ RECURSE ARCHIVES
Example: Find regex:foo.+bar\\txt IN C:\ RECURSE
Example: Find NAME="Text File (1).txt" NOWILD IN C:\ RECURSE
When used with the DUPES argument, this lets you provide a filename filter for the duplicates search. When used like this, you can specify a regular expression pattern by prefixing the wildcard with the regex: prefix.
Example: Find *.pdf IN C:\Documents RECURSE CLEAR MD5 DUPES