Faced for the first time with ModX.
How to edit the pages figured out how to insert snippets, chunks, too.
But tell me, please, set "Snippet: BackupMODXWidget". How to run it from the admin panel that would be used as intended?
Drag a snippet from the trees of the field content, open the settings. The same set of parameters can be viewed by opening the snippet by clicking it in the tree.
Think of it as a little hack for all of the snippets.