org mode下无意间将一行highlight了,怎么都取消不了

对其它行进行set mark 并选中region时,能正常高亮,且在按下 Ctrl - g 后就取消高亮了,但是原先那一行仍然是高亮,不知为何? 还发现将那一行copy到 excel 里面是加粗显示的。是不是设置了什么格式?

找到原因了。是因为按住 Alt 时,拖动了鼠标,做了一个 secondary selection。

----------------- up-event ----------------

<M-drag-mouse-1> at that spot runs the command mouse-set-secondary
(found in global-map), which is an interactive compiled Lisp function
in ‘mouse.el’.

It is bound to <M-drag-mouse-1>.

(mouse-set-secondary CLICK)

Set the secondary selection to the text that the mouse is dragged over.
This must be bound to a mouse drag event.
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