Hi, Bruce Young (b.young)")!
Thanks for reaching out to Microsoft Community and posting your concerns regarding a setting that is missing on your Surface Pro 6. Thanks for noting that the setting shows up on your other Surface Pro 6 and Lenovo devices with the same exact Windows 10 version. May we know if they have the same OS Build? If they do, this might have something to do with the app itself on that specific device.
You may also try to reinstall the app on the device that you have issues with the setting. If you still do not see the setting, please Please check if the Acrobat app on all devices have the same version as well. If not, please check with the app developer if there's some update that was recently released or not. Please visit their support site to see details regarding the version of the app installed on each device.
For the device, please ensure these steps are performed though.
· Check for Windows Update:
Go to Settings > Update & Security > Windows Update > Check for Updates
Please restart your device to apply the updates.
· Run Surface Diagnostic Toolkit and make sure to complete the tasks.
· Force shutdown the device and restart.
- Press and hold the power button until the screen turns off (about 10 seconds), then release the power button.
- Press and release the power button to turn your Surface back on. You should see the Microsoft logo.
If that doesn't work, here's how to make sure your Surface turns off completely:
Press and hold down the power button until your Surface restarts and you see the Windows logo screen (about 20 seconds), then release the power button.
We hope this helps you out. Otherwise, don't hesitate to respond to this thread if there’s anything else that needs to be addressed.
Kind regards,
Janette_Z