Snap functions within CATIA 3dx

Hello,

I was wondering how to control the snap functions within the CATIA 3dx sketcher? Specifically the "snap to grid" or "snap to mid-point", etc.? Or how to get rid of the grid within a "Positioned Sketch", if it is possible. Most likely I will have to go over the entire User Guide to get use to sketching within CATIA. I was just wondering if the info might be accessible on here first.

Thanks for any info you might have.

Edu ​​​​​​​3DEXPERIENCE CATIA ​​​​​​​