2. The method according to claim 1 , wherein the enlarging of the currently displayed font comprises: enlarging the currently displayed font based on one of a parabolic enlargement rule, an elliptical enlargement rule, or a circular enlargement rule with the first enlargement coefficient configured by the operating system and the second enlargement coefficient configured by the current application.
2. The method according to claim 1 , wherein the enlarging of the currently displayed font comprises: enlarging the currently displayed font based on one of a parabolic enlargement rule, an elliptical enlargement rule, or a circular enlargement rule with the first enlargement coefficient configured by the operating system and the second enlargement coefficient configured by the current application. 4. The method according to claim 2 , wherein the enlarging of the currently displayed font based on the elliptical enlargement rule comprises: enlarging the currently displayed font based on the following equation: x 2 k ⁢ ⁢ 1 2 + y 2 k ⁢ ⁢ 2 2 = 1 , ⁢ x < T ; wherein y is a size of the enlarged font, x is the size of the currently displayed font, k1 is the first enlargement coefficient configured by the operating system, k2 is the second enlargement coefficient configured by the current application, and T is the preset maximum threshold.