I don't know how many of you have used the old "paint" program on most compuers, but there is a tool there. a curve tool. it could work by, using "alt"(or some inactive button), to draw a line,(like line tool) then your next click anywhere,and it would throw the cener of the line to that position. ie...... draw a line: "|" click to the right of it: ")" I thought it would be handy. please comment.
There is an alternative. Use the mouse wheel to change cursor size, click, move a pixel distance to the right and you will have a semicircle chord. But if you want to go more complicated like mspaint, then it may be handy but I still find it unnecessary +0