Multitask much? In the Teams desktop client, you can pop out an app into a separate window to help you work on several things at once. This feature is available for most apps that include the personal app or tab capability.
Pop out a personal app
To launch an app in a new window from the start:
Go to the icon of the personal app you wish to open, whether it's an app pinned on the left of Teams or found under More added apps .
Right-click on the app icon of your choosing, then select Pop out app .
To pop out a personal app after it's already open:
Look for the icon in the upper right corner of your screen (most but not all apps will have this). Click the icon and your app will open in a new window.
Pop out a tab
Navigate to the tab of your choosing in a channel or a chat.
Once there, select Pop out tab in the upper right corner of the tab.
Manage the app window
As with any window, there are controls in the upper right corner that let you minimize, maximize, and close the window. You can select and drag a corner of a minimized window to resize it, or click on the title bar and move it until you have the view you need to multitask.