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I do not use Opera much. When I do, sometimes, it shows a dotted line when you scroll down to the bottom of a page. What is that for?

Here is a screenshot:

alt text

About Opera
Version information
10.00 Beta 3
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Why are using a beta version? Opera's stable branch is at 10.60 right now. Update to the final version and see if the problem still exists. I have never seen that line in Opera before, so I assume it's a sort of bug. – Om Nom Nom Aug 7 '10 at 16:34
up vote 3 down vote accepted

It's a "scroll marker". Go to Tools, Preferences, Advanced, Browsing, and check or clear "Show scroll marker" to turn it on or off.

What it's for: When you page down, normally you look back to the top of the screen to start reading again. But when you page down near the bottom of the page, there might not be enough content to fill another full screen. In that case, the the scroll marker will show you where the new stuff starts. (The same thing happens in reverse if you page up.)

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In addition to Bavi_H answer I just can say:
Enter this on your Opera address bar to access "Scroll Marker" option instantly:
opera:config#Enable Scroll Marker
Set the value to 0/1 to disable/enable Scroll Marker and save your setting.

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