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To start a Tuple call, click the “Call” icon to the right of one of your contact’s names:Tuple contact list with the Call button highlighted beside an available teammateNote: You’ll only be able to start a call if the user is online and available (indicated by a green dot next to their avatar).Once you have started a call you’ll be able to share your screen by clicking “Share screen”:Tuple in-call menu with the Share screen button highlighted

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Sharing part of your screen

To start a call sharing only part of your screen, right-click (or Control-click) on your contact’s name:Tuple contact context menu with Share Part of Screen highlightedIf you’re already on a call, you can share part of your screen by selecting the sub-option “Share Part of Screen”:Tuple in-call menu with Share Part of Screen highlightedYou’ll then see a dotted line indicating which part of the screen you’re about to share, along with a toolbar at the bottom of your screen. You can drag the handles of the rectangle to change its size, or drag the rectangle itself to move it around your screen:A resizable dotted rectangle showing the selected part of the screen to shareThe toolbar provides several options for adjusting your selection:
  • Pick a window — Click the window icon in the toolbar (or press Space) to enter pick-window mode. Hover over any window to highlight it, then click to snap the selection rectangle to that window’s bounds. Press Space again to return to manual rectangle mode, or press Escape to cancel. Note: this just sets the screen share boundaries - if the window moves or gets hidden, the boundary won’t change.
  • Pin to half screen — Click one of the directional icons to snap the selection to the left, right, top, or bottom half of your screen.
  • Aspect ratio — Choose a preset aspect ratio (16:10, 16:9, or 4:3) to optimize your sharing area for your pair’s display.
  • Resize without changing dimensions — Hold Shift and drag a corner handle to scale the selection proportionally.
Press Share once you are satisfied with your choices. You’ll then see the red corners indicating what your pair can see:Red corner indicators showing the active shared area after starting a partial screen shareIf you’d like to change what part of your screen you’re sharing, you can opt to “Change Selection”:Tuple menu showing the Change Selection option while sharing part of your screen

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Sharing your screen immediately when starting a call

If you’d like to share your screen immediately when starting a call, you can hold alt to toggle the call button mode.When alt is held, the call button will show the option to start a screen sharing call, which will share your screen immediately when your pair answers:Tuple call button changing to Start Screen Share when Option is held

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Choosing which display to share

If you have multiple displays and choose to start a call with screen sharing, Tuple will prompt you to pick one before the call starts. Just click anywhere on the display you want to share:Tuple prompting you to choose which display to share before the call startsIf you’re not seeing a menu bar on your external display at all, check that you have the “Displays have separate Spaces” setting enabled in Desktop & Dock at the bottom of the page:macOS Desktop & Dock settings with Displays have separate Spaces enabled

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Changing displayed screens during a call

If you’re already sharing a display but want to switch to a different one, you can swap to a specific display by opening the Tuple app menu and clicking “Switch Screen” or by using the quick switcher:Tuple menu showing the Switch Screen option and display quick switcher

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Changing which call participant is sharing their screen

If another call participant is sharing their screen, you can swap to sharing your screen by opening the Tuple app menu and clicking “Share Screen”:Tuple menu showing the Share Screen option while another participant is sharing

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Stopping sharing your screen

When you would like to stop sharing your screen, you can stop by opening the Tuple app menu and clicking “Stop Sharing”:Tuple menu showing the Stop Sharing optionIf you’re currently sharing an external display screen, you’ll need to move your mouse to that display, and open the Tuple app menu on that specific display to see the “Stop Sharing” button.Alternatively, you can find the ability to stop sharing any screen in the dropdown from the Tuple app menu:Tuple app menu dropdown showing screen switching and sharing controls for the active displayNote: To access the Tuple app menu on an external monitor, you will also need to have “displays have separate spaces” enabled (see Changing displayed screens during a call above).