Add to existing value without getting a record?

Hey! Was wondering if I can use 'Edit record' function to do some maths on an existing value, without pulling out a record prior to this.

E.g. there is a record with a value that counts a number of sent emails. Every time I send another email, I want to increment that value. Doable with just 'Edit' or I have to pull the data first?

I know it sounds weird, but I am just learning.