It can be frustrating when you’re working from more than one application with one screen. It can be time-consuming to switch between PDF documents and Word or Excel when you need both for one task. Check out this feature called SplitView.
Chances are, you’re running OS X El Capitan or later so your mac should be compatible.
To enter SplitView, find the Full-Screen button in the top left corner of the application. Click and hold. Two options will become available: tile window to the left of the screen or tile window to the right of the screen. Click which one you would prefer and then simply select the other app you want in the next window.
Other macOS versions:
Click and hold the full-screen button in the top left corner of the application
window. As you click and hold, the window will shrink so you can drag it to the
left side or the right side of your screen.
The app windows can be adjusted by hovering the cursor on the line separating
the two applications.
To exit SplitView, click the full-screen button on either application. This will allow
you to exit and the applications will separate.
Customize Your Volume Control
The audio is too loud in one setting but too low in another setting. It’s time to
customize the system volume control.
Hold down Shift+Option and then your volume key to adjust your system volume