Using split screen allows even those without more than one monitor to still have two windows on the screen. This is ideal if you are attending a webinar and don't have a second device that you can follow along.
The steps for using split-screen are slightly different on a Windows PC and on a Macintosh.
The finished result would appear like this:
Windows PC Split-Screen
If you split your computer screen, you can run multiple applications, at a time. Here is how to split-screen in windows 10.
How to split-screen in Windows 10
A split-screen is a software program, capability, or feature that enables a user to split their window or screen horizontally or vertically. Split-screen enables the user to view multiple sections of the same document or multiple files at once. If you split your computer screen, you can run multiple applications, at a time. You can view one application in one half of the screen and your word document in another, or display various status displays across your entire monitor. Windows 10 has a feature called “Snap Assist” that allows you to drag and drop a window to the part of the screen you want to snap it to. How to turn on the Snap assist feature in Windows 10:
- Launch the Windows 10 Settings by pressing the keyboard shortcut Windows Key
+ I - Click on the System and then Multitasking from the list.
- On the right side, you can see the Snap options, turn on the sliders.
- Now the Snap features are enabled on your Windows 10.
Choose one of the 'Snap assist' options:
- Arrange windows automatically by dragging them to the sides or corners of the screen.
- When I snap a window, automatically size it to fill available space.
- When I snap a window, show what I can snap next to it.
- When I resize a snapped window, simultaneously resize any adjacent snapped window.
Here is how to split your screen in Windows 10:
- Open two or more windows or applications on your computer.
- Place your mouse on an empty area at the top of one of the windows, hold down the left mouse button, and drag the window to the left side of the screen.
- Now move it all the way over, as far as you can go, until your mouse won't move anymore.
- Then let go of the mouse to snap that window to the left side of the screen. It should now fill half of the screen, or the corner if you managed to drag it there.
- Now select any of the other windows that are now open on the right side to snap it to the right side of the screen.
- Now that the two screens are beside each other, drag the dividing line that separates them to resize both windows simultaneously.
NOTE: You can also quickly click on the Windows key and then either the left or right arrow
and 
to snap the active window to a side of the screen.
Split Screen on a Macintosh
With Split View, you can fill your Mac screen with two apps, without having to manually move and resize windows.
Enter Split View
If you're using macOS Catalina or later:
- Hover your pointer over the full-screen button
in the upper-left corner of a window. Or click and hold the button. - Choose ”Tile Window to Left of Screen” or ”Tile Window to Right of Screen” from the menu. The window then fills that side of the screen.
- Then click a window on the other side of the screen to begin using both windows side by side.
If you're using macOS Mojave, High Sierra, Sierra, or El Capitan:
- Click and hold the full-screen button
in the upper-left corner of a window. - As you hold the button, the window shrinks and you can drag it to the left or right side of the screen.
- Release the button, then click a window on the other side of the screen to begin using both windows side by side.
If you can’t enter Split View
If Split View doesn't work, choose Apple menu > System Preferences, click Mission Control, and make sure that “Displays have separate Spaces” is selected.
Work in Split View
In Split View, you can use both apps side by side, without the distraction of other apps.
- Choose a window to work in by clicking anywhere in that window.
- Show the menu bar by moving the pointer to the top of the screen.
- Swap window positions by dragging a window to the other side.
- Adjust window width by dragging the vertical line between the windows.
- Switch to other apps or your desktop with Mission Control, or use a Multi-Touch gesture such as swiping left or right with four fingers on your trackpad.
Exit Split View
- Move the pointer to the top of the screen to reveal the window buttons.
- Click the full-screen button
in either window. That window exits Split View. - The other window switches to full-screen view. You can switch to the full-screen window with Mission Control, or use a Multi-Touch gesture such as swiping left or right with four fingers on your trackpad.