OS X Yosemite: Work in multiple spaces
If your desktop becomes cluttered with open app windows, you can use Spaces to organize the windows into groups. When you’re working in a space, you see only the windows that are in that space.
To quickly see and go to your spaces, zoom to Mission Control.
Create a space
Zoom to Mission Control, then move the pointer toward the upper-right corner of your screen. (If your Dock is on the right side of the screen, move the pointer toward the upper-left corner.)
To add a space, click Add . You can add up to 16 spaces.
To leave Mission Control, use the same swipe or key(s) that you used to zoom to Mission Control.
Move between spaces
Do any of the following:
Swipe left or right with three fingers.
Zoom to Mission Control, then click the space you want.
Press the Control key and the Right or Left arrow key.
Move an app window from one space to another
Do any of the following:
Drag the window to the edge of your screen. After a moment, the window moves to the next space.
Place the pointer over the window’s title bar. Hold down the trackpad or mouse button, then press the Control key and the Right or Left arrow key.
From the space that has the window you want to move, zoom to Mission Control. Then drag the window up to the space you want to use.
Assign apps to spaces
If you assign an app to a particular space, it opens in that space by default.
Press and hold an app’s icon in the Dock. You may have to first open the app from Launchpad to see its icon in the Dock.
From the shortcut menu that appears, do one of the following:
Have the app open in the current space: Choose Options > This Desktop.
The app appears only in that space. However, if you open the app in full screen, it appears in its own space.
Have the app open in the current space on a specific display: Choose Options > Desktop on Display [number].
Have the app open in every space: Choose Options > All Desktops.
The app appears in every space.
Have the app open in whichever space you’re using at the time: Choose Options > None.
In Mission Control preferences, you can also specify that, when you switch to an app, your desktop should switch to a space with open windows for that app. To open Mission Control preferences, choose Apple menu > System Preferences, then click Mission Control.
Delete a space
Zoom to Mission Control.
Place the pointer over the space you want to delete. After a moment a delete button appears. Click it to remove the space.
If the space contains windows, the windows are moved to another space.