I had thought that timeline events were indicated in a Bible by a flag icon. This is what the help resource indicates. They now seem to use a very small asterisk, which is almost unnoticeable. I admit that I usually keep the timeline Visual Filter off, because the flag was intrusive. But now I have great difficulty even finding the timeline indicator. I don't know if this is a bug or intentional.
There are also many biblical events that do not have a timeline icon. For example, there is no Timeline indicator in 2 Kings 18:1 (" the third year of Hoshea") or in Isaiah 6:1, which refers to the year of King Uzziah's death as the call of Isaiah. Isaiah 1:1 refers to the reigns of Uzziah, Jotham, Ahaz and Hezekiah and there are no Timeline indicators for these events. I think it would be very valuable to include timeline indicators in the prophetic books, in order to set them in historical context. The more I look at it, the more I am surprised by how many key biblical events are missing in the Bible.
*Logos 9.3 Beta 3