You can move the blue lines with the mouse. You will find further options in the Context menu, including adding an additional print range, removing the scaling and inserting additional manual line and column breaks.
可以用鼠标移动蓝色的行。在上下文菜单中还可以找到更多选项，包括添加其他打印区域、取消缩放以及插入其他的手动换行符和手动分栏符。