InfoPath 2010 : How to make Text fields Visible False

I was just trying to figure our, how can we make the fields visible false in Infopath designer 2010.

I didnot find any direct way, but what we can do is, while designing, create textfield, appropriate field name will get create under "MYfields". Later delete the Text field from UI, but stil you can work with the fields declared under "MyFields".