Here are some examples which illustrate some of the things you can do with Métamorphose.

Words in italic refer to buttons, fields, checkboxes, etc...
Unless specified otherwise, all the following examples assume you have already selected one or more items to be renamed from the picker tab.
If you leave Auto Preview checked, any changes made will instantly display results. Otherwise you will need to press the Preview button to display changes.


- Main - panel:

Insert numbering sequence at begining of existing filename:
Check the prefix checkbox. Click on the numbering button at top of panel. You should now have the text ':numb:' in the prefix box, and your items will have an auto-padded numbering sequence as a prefix.

Replace entire name like so: numbering sequence then text:
Check the Search checkbox. Leave the Text (blank for all) field blank. Click the numbering button, now type some text. The field should look like this: ':numb: some text I typed in'.

Remove all spaces:
Check the Search checkbox. Click in the Text (blank for all) field, then press the spacebar on your keyboard. Leave the Replace with (blank to delete): field blank.

Remove all non-alphabetical characters:
Check the Search checkbox. Click the Character sets: radio button. Check Anything but: and [a-z].

Convert entire name to lowercase:
Check the Search checkbox. Leave blank the field Text (blank for all). Click the Modify radio button, then select lowercase from the drop-down menu.

Convert file extension to lowercase:
Same as above but uncheck name and check extension for Operations act on: on the top left of the panel.

Move first 3 characters of name to end of name:
Check the Search checkbox, then the Position radio button. On the Position line, enter '3' in the Length field. Now check the Move radio button, and use '-1' as the Position.

Rename MP3 file like so: number_title:
Check the Search box. Leave blank the field Text (blank for all). On the top of the panel, select track from the dropdown menu next to the id3 button. Click the id3 button, now type the _ character on the keyboard, then select title from the id3 dropdown menu, and click the id3 button again. The field should now look like this: ':track:_:title:'. Alternatively you could use numbering instead of getting the track number from the file.



Numbering panel:

Count like this: I, III, V, I, III, V ... :
Click on Roman Numeral, set the Count by: value to 2, and set the Reset value to 3.

Count like this: W, V, U, T, S, R ... :
Click on Alphabetical, select Uppercase, set starting number to 23, and set Count: to down



Bit more advanced stuff:

I want to renumber my .mp3's in a different order (good for mixes):
In Picker panel click on browse or hit F5, select folder, and press OK. Still in picker, set Sorting to No Sorting, then click on files in the order you want them renumbered. Go to Main panel, select Prefix and click the numbering button. Now select Search, then click on Character Sets, and finally choose [0-9].
This only works if the song titles have no numbers in them. Other way is to select Position instead of Character Sets and set Length to however many characters are taken up by the track number, and Position to where they occur.