What are the conditions for manuals to appear in "Recently Viewed"?

Manuals currently published that you have viewed within the last 3 months from the web Browser, mobile browser, or mobile app will be displayed in "Recently Viewed." (Up to 50 items)
※This also includes cases where you have viewed a linked Manual or a Manual within a Training course.

As exceptions, the following cases will not be displayed in "Recently Viewed."
・When you view a Manual from the "Tasks" screen
・When you open the editing screen of an unreleased Manual (Draft)
・When you open the editing screen of a Manual
・When you view a bookmarked Manual on a mobile device that is not connected to the internet

Related: Can I view Manuals in an offline environment?
https://help.teachme.jp/hc/en-us/articles/900006443943