1. A portable electronic device comprising a display unit capable of scrolling through images on a screen, wherein the portable electronic device uses: a still character font used for at least one character on a still screen; and at least one scroll character font used for at least one character on a scroll screen, the scroll character font having the same characters as the still character font, wherein the characters of the scroll character font have at least one different visual characteristic when compared to corresponding characters of the still character font.