2. The method of claim 1 , further comprising: estimating a start point candidate location as the start location of the block, based on the first location where the first anchor interaction is input; and displaying one of the first plurality of candidate anchors at the start point candidate location.
8. The method of claim 2 , wherein estimating the start point candidate location comprises: estimating a start location of a word after a space closest to the selected location where the first anchor interaction is input, a start location of a word closest to the selected location, and a start location of a sentence closest to the selected location.