11. A mobile device supporting an Electronic Book (e-book) function, the mobile device comprising: a display unit for displaying e-book content, and highlighting guide items and text selected from the e-book content according to the guide items, wherein the guide items guide a user to select the text in the e-book content; a storage unit for storing the guide items and setting information, wherein the setting information is related to a mode for displaying a block that designates the text according to the guide items and a mode for estimating candidate locations according to anchor interactions and a controller for estimating the candidate locations to designate a block, based on the anchor interactions applied to the e-book content, displaying a first plurality of candidate anchors at corresponding candidate locations between first text items of the e-book content based on a first location where a first anchor interaction is input, determining a first candidate anchor from the first plurality of candidate anchors to be a first definite anchor when the first candidate anchor is selected, removing remaining candidate anchors of the first plurality of candidate anchors, except the first candidate anchor for a start location of a block, displaying a second plurality of candidate anchors at corresponding candidate locations between second text items of the e-book content based on a second location where a second anchor interaction is input, determining a second candidate anchor from the second plurality of candidate anchors to be a second definite anchor when the second candidate anchor is selected, removing remaining candidate anchors of the second plurality of candidate anchors, except the second candidate anchor for an end location of the block, and forming the block enclosing the text between the first definite anchor and the second definite anchor, wherein the first and second anchor interactions are input at locations corresponding to a start location of corresponding text or a location close to the start location.
11. A mobile device supporting an Electronic Book (e-book) function, the mobile device comprising: a display unit for displaying e-book content, and highlighting guide items and text selected from the e-book content according to the guide items, wherein the guide items guide a user to select the text in the e-book content; a storage unit for storing the guide items and setting information, wherein the setting information is related to a mode for displaying a block that designates the text according to the guide items and a mode for estimating candidate locations according to anchor interactions and a controller for estimating the candidate locations to designate a block, based on the anchor interactions applied to the e-book content, displaying a first plurality of candidate anchors at corresponding candidate locations between first text items of the e-book content based on a first location where a first anchor interaction is input, determining a first candidate anchor from the first plurality of candidate anchors to be a first definite anchor when the first candidate anchor is selected, removing remaining candidate anchors of the first plurality of candidate anchors, except the first candidate anchor for a start location of a block, displaying a second plurality of candidate anchors at corresponding candidate locations between second text items of the e-book content based on a second location where a second anchor interaction is input, determining a second candidate anchor from the second plurality of candidate anchors to be a second definite anchor when the second candidate anchor is selected, removing remaining candidate anchors of the second plurality of candidate anchors, except the second candidate anchor for an end location of the block, and forming the block enclosing the text between the first definite anchor and the second definite anchor, wherein the first and second anchor interactions are input at locations corresponding to a start location of corresponding text or a location close to the start location. 15. The mobile device of claim 11 , wherein the controller displays the first or second plurality of candidate anchors based on two start points of words and one start point of a sentence with respect to a location where the first or second anchor interaction is input.