如何辨别：如果这是问题所在，仅阅读本文就可能已经让您意识到这一点，但无论如何要解释一下：有时勾勒选区的闪烁线很烦人，因为它让人很难看到重要的细节图像，因此GIMP为您提供隐藏选选区的选项，方法是取消选中视图菜单中的显示选区。不过，很容易忘记您已经这样做了。

How to fix: If this hasn't rung any bells, it isn't the problem, and if it has, you probably know how to fix it, because it doesn't happen unless you explicitly tell it to; but anyway: just go to the View menu for the image and, if Show Selection is unchecked, click on it.