When editing a pattern for the “Rename” action, the counter attribute becomes available.
This attribute represents a number that increases by one each time the action runs. You can use this in a renaming action to number files. For example:
In the pattern above, the counter follows the filename and a hyphen, and comes before the extension. So, if your rule repeatedly encounters and matches new files named somefile.doc , this action creates files named somefile-1.doc , somefile-2.doc , and so on. But it works the same way even when filenames differ. For example, suppose your condition matches files whose names begin with Z, and you drag the files Zing.txt , Zip.doc , and Zoom.xls into the monitored folder. A “Rename” action with the pattern above would name them Zing-1.txt , Zip-2.doc , and Zoom-3.xls , respectively.
Note: Each folder has its own counter.
You can customize the numbers (or letters) used in a counter in several ways.
First, if you click the tiny arrow in the counter token, a pop-up menu appears with numerous options.
“Always increment”/“Use lowest available”: By default (using the “Always increment” setting), the counter always increases; it never backtracks or fills in holes in the sequence. But if you remove filename-1 and filename-2 from your monitored folder while leaving filename-3 there, you can instead choose “Use lowest available” to force Hazel to choose the lowest number that’s not already in use by a file in the monitored folder.
“1, 2, 3…”/“a, b, c…”: Choose “1, 2, 3…” (the default) to use numbers, or “a, b, c…” for letters.
When you’re finished customizing your counter, click “Done.”