Well , not really a complex tutorial this time but a funny tric to avoid desperation
the pixel lock is the most wanted on the list but will arrive o 2.8 so i made this tutorial if you are inking comics and yo have ruined your sketch for some reason (ink in wrong layer) the idea comes from
for his problem with comic inks. [link]
hope you like it. 4 pages of tutorial for a trick that will save you a lot of time redoing things!