Reach
Reach increases your attack range.
Most anti-cheats detect Reach. Backtrack gets you extra hits through lag instead.
Settings
Min
Minimum reach, in blocks.
Max
Maximum reach, in blocks. Each click picks a random reach between Min and Max.
Weapon only
Only works while you hold a weapon, as defined in Weapons.
Moving only
Only works while you're moving.
Sprint only
Only works while you're sprinting.
Hit through blocks
Lets you hit players behind blocks.