If handlebar makers are going to put markings near the stem, as in the attached photo, they could put them on the bends for quick lever placement. I have no clue what use those clamp area markings are good for, by the way.



I ride with traditional bend drop bars and usually start from scratch - mount the levers, snug 'em up a bit, put the bars on the floor and get the lever tips to touch the floor. Then I mark the clamp band positions with a Sharpie and ride around for awhile with reference points if I need to make adjustments. No need to carry a broom handle.