Mac Option Key

Similar to revealing extra options using Shift-Right-Click in Windows, macOS has a ton of hidden features when holding down the Option key, which the article at the following link does a good job of detailing.  The most useful to me is using Option with the Menu Bar icons, for example, showing expanded commands and information under the Wifi icon, as seen below.

https://www.cultofmac.com/213986/mastering-the-option-key-on-your-os-x-mac-feature