What does this icon on my layout tab mean?

[KeithAddison1]

Pro 2.8.3 - I have a layout that is refusing to show anything in its data frame.  Sometimes it crashes the program.  A rather sinister looking icon has appeared over the layout tab.  I can't get any information by hovering over it.  Anyone know what exactly it means? (other than my general conclusion that this layout is fubar)

[jcarlson · Accepted solution]

It means that the rendering on that particular tab has been paused. Check in the lower-right to pause/unpause rendering.

[KeithAddison1]

Dang how did I accidently pause it...oh well, here's one for the stupid question HOF.