How to add new fields in the YML Yandex?

Good time of day.
Can not really figure out a simple task-add a new field to the YML Yandex (upload a directory to the market).
Tell me in what file to edit, where to dig?
Thank you in advance
July 2nd 19 at 18:25
1 answer
July 2nd 19 at 18:27
If by new you mean fields, properties trading, it is done here:
Store > Settings > Export data.

Here in this window: f227908e5dd94068ab4c57892e5de1bf.PNG

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