Whether your eyes are getting older and need to read something like a menu or you want quick access to a calculator, the iPhone has a quick way to get to tools to help you. The Control Center is accessible by swiping down from the top right of the screen.

What is not well known is the easy way you can add or delete the tools that will be available when you swipe down. To modify the tools, on your iOS device, go to Settings > Control Center. There, you will see “Included Controls” which are the basic ones that come preinstalled and then you have “more controls” that include various tools that are available to you when you swipe down from the top right corner of your iOS device.
Once you are go to Settings > Control Center, tap on the green plus button in the More Controls to move an item to the Included Controls. If you want to move an included control out, tap on the red minus button to the left. That will not delete the control but will simply move it to the more controls to be available later if you want to add it back.
To the right of each control in the included controls list are 3 lines. If you tap and hold on that handle, you can drag and drop the control to a location. The closer towards the top, the higher up it will be in the control center.

Once you are satisfied with the controls, you can then swipe down from the top right and see the controls available.
By the way, the magnifier tool (magnifying glass with +) is great for zooming in on a menu, to see ingredients on the side of a bottle, menu, etc. You can even turn on the flashlight or take a quick picture and share it.
Use the control center to get quick access to tools to make your life easier.