How to sync PDF bookmarks from MacOS Preview to iOS Apple Books?

pdf ios preview books

There is a setting in Books.app Preferences to sync Bookmarks across devices, or not. Make sure that's on.

enter image description here

Related

Dysfunctional trackpad on 2007 Macbook
Macbook Pro starts by itself, with lid closed, since upgrading to Mojave
Cannot boot into Recovery
Remap Space and Command
OS X El Capitan Downloading problem
Make Notes app copy text as plain text
macOS native VPN can't cifs:// into file server on another network
Find multiple files at once via Terminal
Time Machine "there isn't enough space" despite the backup disk being larger than mine [duplicate]
Applescript - Close all windows except frontmost window
3rd Gen Macbook pro randomly suspends
Troubleshooting Slugglish Post-desktop Startup