Multi-touch based drawing input method and apparatus

An electronic device, the electronic device comprising;

• an input unit configured to receive at least one touch input;
• a display configured to display at least one information;
• and
• a control unit configured to control:
• receiving, by the input unit, a first touch input on a screen of the electronic device during a first time period;
• displaying, by the display, guide information comprising at least one line, wherein the at least one line defines a bounded region on the screen, in response to receiving the first touch input
• receiving, by the input unit, a second touch input during a second time period, the second time period overlapping the first time period;
• displaying, by the display, a first line responsive to receiving the second touch input based on the guide information, a length of the first line being changeable responsive to receiving the second touch input, wherein the first line is adjacent to the guide information;
• and
• displaying, by the display, supplemental information related to the first line in the bounded region on the screen responsive to receiving the second input, the supplemental information including a numeric measurement related to the first line, the supplemental information being changeable responsive to receiving the second touch input.