Walk through the code and place your cursor on the marker bar (along the left edge of the editor area) on the line with the suspected code. Double-click to set the breakpoint.
遍历代码，将鼠标放在可疑代码一行的标记栏（在编辑器区域的左侧）上，双击即可设置断点。
2
Walk through the code and place your cursor on the marker bar (along the left edge of the editor area) on the line with the suspected code.
遍历全部代码，将光标放置在含有可疑代码的那一行的标记栏上(在编辑器区域的左侧)。
3
Activate any selection tool, then hit the Refine Edge button in the options bar.