Question 1 - Go to Settings > General > Keyboard, then tap Text Replacement.

Save keystrokes with text replacements on iPhone

Question 2 - To turn on Silence Unknown Callers, go to Settings > Phone, then scroll down, tap Silence Unknown Callers, and turn on the feature. Calls from unknown numbers are silenced and sent to your voicemail, and appear in your recent calls list.

Question 3 - To see more of the screen, do any of the following: Adjust the magnification: Double-tap the screen with three fingers (without lifting your fingers after the second tap), then drag up or down. Or triple-tap with three fingers, then drag the Zoom Level slider.

Question 4 - Step by step guide

Find the Accessibility settings. Tap the Settings icon on your Home screen to open the Settings app. ...

Open the Zoom settings. On the Accessibility screen, tap Zoom.

Enable Zoom. On the Zoom screen, tap the toggle switch for Zoom to turn it on.

Choose how the screen is magnified.

Question 5 - I recommend going to the menu bar on your Mac by selecting the Apple icon > System Preferences > Keyboard. Select the "Keyboard" tab and make sure that, "Show keyboard and emoji viewers in menu bar" has a check mark. From there, you can press Control–Command–Space bar. The Character Viewer pop-up window appears. Here's a helpful article with that information: How to use emoji, accents, and symbols on your Mac

10:10:03 From Terry Maros to Everyone:

Go to Settings > General > Keyboard, then tap Text Replacement.

Save keystrokes with text replacements on iPhone

10:23:44 From Terry Maros to Everyone:

https://www.cnet.com/tech/mobile/you-can-easily-track-flights-in-imessage-on-your-iphone-this-holiday-season-heres-how/

10:26:05 From Terry Maros to Everyone:

Zoom in and out on what's onscreen on Mac

Zoom in: Press Option-Command-Equal Sign (=).

Zoom out: Press Option-Command-Minus Sign (-).

Quickly switch between zoomed in and zoomed out: Press Option-Command-8.

10:52:08 From Terry Maros to Everyone:

Spotlight for external drives

https://discussions.apple.com/thread/250047861?sortBy=best

10:54:28 From Terry Maros to Everyone:

Spotlight privacy

10:58:46 From Terry Maros to Everyone:

http://rootrisetech.com/product/pdfoptim

Optimize PDF files