Document icon with left side triangle?

What is this document icon mean? I can’t find it in the documentation.

Looks like a fluke to me…

Given your forum history, this is in regards to the Mac version?

Either way, given the appearance of the page icon it looks to be the old version of Scrivener. If this is being run on macOS 10.14, it may just be an interface glitch. Version 2 was never tested to work on that system (though it technically can, and I’ve never seen that happen, who knows what all factors might be involved).

So yeah, I concur, it’s probably just a glitch. Maybe it’s a custom icon though? Try resetting it to default from the right-click menu.