# Rename Actions > Rename

In the Actions menu, the Rename command renames the selected files and folders. In the Action subsection, you can pick either DOS compatible or Regular expressions rename. DOS rename To rename files using DOS wildcards, pick DOS compatible in the Rename dialog. In the New mask edit, enter the new name. If multiple files or folders are selected, a base mask is computed which represents the overlap of all the names. An asterisk (*) is used to represent one or more characters, while a question mark (?) is used to represent a single character. Leave these characters alone, but change others to produce unique names for each of the selected files or folders. Examples: Assume that you've selected the following files to rename: abc1.txt abc2.txt abc3.txt If you enter "abc?.bak" as the new mask, the files will be renamed to: abc1.bak abc2.bak abc3.bak If you enter "xyz?.txt" as the new mask, the files will be renamed to: xyz1.txt xyz2.txt xyz3.txt Regular expression rename To rename files using Perl compatible regular expressions, pick Regular expressions in the Rename dialog. In the Old mask edit, enter a regular expression that is matched against the original filename. In the New mask edit, enter a template used to generate a new filename. Examples: Assume that you've selected the following files to rename: abc1.txt abc2.txt abc3.txt If you enter "txt" as the old mask and "bak" as the new mask, the files will be renamed to: abc1.bak abc2.bak abc3.bak If you enter ".*(\d\.txt)" as the old mask and "xyz$1" as the new mask, the files will be renamed to: xyz1.txt xyz2.txt xyz3.txt