Oh, I fully understand how to do it, but again, it's not that simple with our asset system. If EVERY asset was a 16x16 metatile, this would be simple. But since you can literally make any size asset that you want, this becomes a bit tough, as you have to determine where the *next* tile would start based on the width of the current tile, height of the current tile, etc. Not to mention, a program like RPG maker or GameMaker or Unity doesn't have to worry about things like painting attributes, which line up on a 32x32 grid, with quadrants that have to be defined...which of course, is not how assets themselves work. This is super complicated to do by any means, but trying to do what you're describing, for any sized asset, is incredibly complicated. Not impossible, but where there are so many things to better refine and fix, the inconvenience of clicking to add tiles is a bit low on our priority list! haha