Boolean Expression
Boolean expression search type defines whether Boolean expressions are matched on a line by line basis or matched across the whole file.
For example "File AND Pro" on a line by line basis would find only lines with both File and Pro on them and therefore only files where File and Pro both occurred on at least one line. However if matching across the whole file the same expression would find files where both File and Pro occurred anywhere in the file either on the same line or on different lines.
The 'Allow wildcards' option specifies whether or not the Boolean expression phrases will treat the characters * or ? as wildcard characters. For more information see Boolean Expressions.
Search
By default FileLocator Pro searches files in multiple phases. It first collects information about the files specified in the 'File name' criteria and then, in a second phase, goes back and searches those files. This allows FileLocator Pro to show more accurate progress information to the user.
However, there are times that this may not be the preferred search method. For example on very large searches where millions of files are being content searched or when the files are temporary and may have moved or deleted between the first and the second phases a single phase search might be preferrable. To force FileLocator Pro to search each file as soon as it's located switch to 'Single phase' search.
Note: FileLocator Pro automatically switches itself to single phase search if it detects that maintaining the file search list is consuming too much memory.
The 'Display Hit Count' option specifies whether or not FileLocator Pro displays the number of hits found within each file in the Hit column in the File List View. When this option is switched OFF FileLocator Pro may search files in 'Just In Time' (JIT) search mode.
JIT searching only searches enough of the file to decide whether or not it is a valid result and not necessarily the whole file. The last search position in the file is recorded and the file is only completely searched when the full results are required for display or export. This can be useful for searching very large files where the full results aren't necessarily required.
Enhanced File Searching
Selecting the 'Office/PDF documents' option instructs FileLocator Pro to perform extra processing of common Office file formats that are registered on the computer. Without this option selected FileLocator Pro will only search through the raw binary data of the file formats.
More information on how FileLocator Pro will search documents is accessed through the 'Settings...' link, which opens this dialog:
Note: The actual extensions listed will depend on each individual computer setup.
File formats with registered processing extensions (extensions specifically designed to help search programs process the format) are shown in the list. If either Deep Search or specific extensions are activated then FileLocator Pro will use the registered extension to process the file format prior to searching. If the search fails or the extension fails to provide results then FileLocator Pro will also search the raw file data if Deep Search or 'Also search raw document data of processed files' are specified.
The 'Outlook PST Searching' switches on .PST archive searching. For more information see Outlook PST Archive Searching.