选择Design选项卡，然后擦除全部现有内容。
Select the Design TAB, and erase all of the existing content.
他们全部使用假名，而我甚至无法把这些假名与上述国家进行对照，因为就在我读到这段内容之后不久，一个自称"Tux"的人就擦除了这些记录。
They all speak through pseudonyms, but I don't even know which psuedonym comes from what country because shortly after I read these answers, someone who calls himself “Tux” erases them all and writes
光标可以变成橡皮擦，擦除先前输入的任何内容，也可以变成椭圆工具，绘制多个新的椭圆。
The cursor can become an eraser tool and erase anything previously entered, or it can become an ellipse tool and draw any number of new ellipses.
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