How do I adjust V-brakes as the pads wear? I have V-brakes and when the pads wear down, the brake needs adjustment.
Adjusting by undoing and tightening the cable is difficult, is there an easier way to adjust V-brakes to compensate for pad wear?
The rim brakes on my last bike had a barrel adjuster that did what you ask.  My new bike has disk brakes and they self-adjust.

The barrel adjuster here is the black cylinder on the right-side.  The brake housing/cable pass through the middle.  To bring the pads closer to the rim, rotate the barrel adjuster so it comes out from the lever's body by a turn or two, and then tighten the thinner lock ring in the opposite direction against the body.  Check the rim still rotates freely between the pads.