Add to File Time: This function adds (or subtracts) the specified number of seconds to the current time stamp for the file(s). To subtract seconds, enter a negative value. For example, to roll back the current time stamp by one hour, enter a value of 3600. The file date will also be adjusted +/- if your "Add to File Time" value causes the new file time cross midnight. If "Also Set Creation Date" &/or "Also Set Access Date" are checked, these values will also be adjusted.