If the _expression_ is empty, then by default _replacement_ will be added to the start of the filename. With *--all*, _replacement_ will be inserted in between every two characters of the filename, as well as at the start and end.
-Normally, only the final path component of a filename is updated. But if either _expression_ or _replacement_ contains a _/_, the full path is updated. This can cause a file to be moved between folders. Creating folders, and moving files between filesystems, is not supported. With *--symlink*, the update is always applied to the link's full path.
+Normally, only the final path component of a filename is updated. (Or with *--symlink*, only the final path component of the link.) But if either _expression_ or _replacement_ contains a _/_, the full path is updated. This can cause a file to be moved between folders. Creating folders, and moving files between filesystems, is not supported.
== INTERACTIVE MODE