cheditor.js 의 1330 줄 이하 부분의

    this.width                    = "100%";
    this.height                   = "300px";
    this.fontsize                 = '9pt';
    this.fontcolor                = '#222222';
    this.fontface                 = '굴림';
    this.lineheight               = '1.1';
    this.padding                  = '10px';
    this.editorBgcolor            = "#ffffff";
    this.editorBorder             = "1px #999 solid";
    this.editorToolbar            = "border-left:#999 1 solid;border-top:#999 1 solid;border-right:#999 1 solid;background:#f0f0f0;";
    this.editorPopupBgcolor       = "#ffffff";

에서 값을 변화시켜 보세요....^^