How can I drag an object with touch on X and Z axis without disrupting the gravity of the rigidbody?

Hi! I am new to Unity and wondered what the best way would be to make a script to make my object move by touch in the X and Z axis without affecting the gravity of the rigidbody! I've basically made an object with a rigidbody and would like to preserve the gravitational force of it, but still be able to "guide" the object with touch (on mobile) as it is falling! Is that even possible? Thankful for answers! (Sorry for any grammatical errors, aren't a native speaker!)