Thank you for your reply. However, I was able to find out that the issue in case anyone else has this complaint is that Outlook has a new Display Settings tab (at the lower right corner). It offers two options. The first is to Optimize for best appearance and the second is to Optimize for compatibility. It offers:
"Today many modern displays are what we call "High DPI" displays - which means they're capable of very high screen resolutions. However there are still a lot of older, low DPI, monitors still in use. Normally this doesn't cause any issues, but if you have a multi-monitor setup (such as a high DPI laptop connecting to a low-DPI external monitor via a docking station) you may see some awkward display issues when you move Office apps back and forth between the displays.
To address these issues we've introduced a feature in Microsoft Office 2016 for Windows that dynamically scales the application window to adjust for when you move Office apps back and forth between high and low DPI monitors. This feature is on, by default, in Office
2016 and Office 2019 on Windows 10.
Note: The improvements in this update are available to Office 365 subscribers, as well as Office 2016 and Office 2019 Click-to-Run installations.
Display issues with add-ins
In a few unusual cases, you may see odd display behavior with certain third-party add-ins like COM add-ins. You may also run into problems if you open documents that have embedded controls (for example, macros, buttons or ActiveX controls). In those cases, you may see some of the following issues.
- The add-in draws in
the wrong location or draws as an incorrect size. - UI elements in the
add-in, such as buttons and labels, appear in the wrong location. - Images
in the add-in appear too small, too large, or appear in the wrong location. (emphasis added)."