[TxMt] How to specify a Scope for a snippet

[Christian Schwanke]

Hi,

I've defined a sinppet that automatically expands the " character to 
"`"' used for quotation in latex.
However, I want this behaviour only to work, when editing a *.tex-file.

In the bundle-editor, there is a field named Scope and I suppose that's 
the one I need - However, I don't know what exactly to specify there.
Any hints are gladly appriciated,

Regards,
Christian