Elements Display in Manager

Using Rev. 2.2.1-pl

Could someone please explain where Manager gets the information to display categories and elements in the Elements List?

eg - where do the names displayed in Elements>Chunks>Login> come from, and why aren't all the .Tpl files stored at core>components>login>elements>chunks> displayed here?

Sorry for my ignorance but I'm struggling a bit with some of the detail.

Thanks

elements (for example chunks) displayed in the Element-Tree are records of db-tables. There are db-tables for each element-class (modChunk, modSnippet, modPlugin, modTemplate, modPlugin, modCategory).

The tree-nodes have nothing todo with files in a file-directory.
If you need custom-chunks for Login you need to create a chunk by yourself.

This can be chunks in the element-tree (db-table-records) or files depending on the tplType - properties.
Also property - inline - tpls are possible.

See:
http://rtfm.modx.com/display/ADDON/Login.Login

Thanks Bruno17. That explains it.
I'm having trouble getting front-end editing of profile using Login.UpdateProfile to work so am searching evrywhere for a solution :-(