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 version, mobile Browser, or mobile app will be displayed in "Recently Viewed." (Up to 50 items)
※This includes cases where you 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 viewed a manual from the "Tasks" screen
・When you opened the editing screen of an unpublished manual (draft)
・When you opened the editing screen of a manual
・When you viewed a bookmarked manual on a mobile device not connected to the internet

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