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Occasionally, in chat, a dashed bar appears. It is called catchup-marker (as you can read in its CSS).

catchup marker

The chat FAQ says:

If you have chat open but we don't think you've seen new messages, the system adds a dotted line like this

My questions:

  • When exactly does it appear? The FAQ says, "Anything below that should be new to you", but how is it implemented?
  • Can I somehow force it to appear?
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up vote 10 down vote accepted

It's pretty simple actually: It'll appear above the last monologue (that's what we call the "bubbles" of one or more subsequent messages by a single user) at the moment that you unfocus the chat window. So that's also how you force it to appear: By clicking on another window/your desktop/etc.

The last three positions that such a marker was inserted will stay visible, with older ones being fainter:

three different shades of the catchup marker

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your arrows need work... :) – Malachi Apr 24 '14 at 14:15
Don't you dare criticizing my freehand arrows! They're beautiful! – balpha Apr 24 '14 at 14:46
I said it with a smiley.... – Malachi Apr 24 '14 at 14:49

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