The player's Base Damage is the main source of information leading to the player's overall damage. It is separate from the auto base damage upgrade and click base damage upgrade; rather, the upgrades affect the player's base damage to give the player his or her overall damage. This is excluding other bonuses like Orbs, Event Point Milestones, percentage bonus from challenges, and Ascension Upgrades which are multiplicative to the user's overall damage output.
Base damage is located in the Character tab, which can be opened by pressing the key 'C'.
Base damage is composed of 5 bonuses:
NOTE: the Challenge Milestone bonus is added numerically to the total base damage displayed on the character screen, but it actually represents a percentage boost.