Abstract: Several methods are described herein to allow users to manage and synchronize views in a multi-user application with canvas (infinite or otherwise) and limited or unlimited zoom. Without these synchronization methods, coordinating views is very difficult, and may lead to chaos as one or more of the users gets lost on the canvas. A “View Sync” method provides for many-to-one synchronization, where many users are automatically synchronized with one user. A “Sync View” method provides for one-to-one synchronization, where one user is synchronized to another user's view. Preferably, off-screen “activity indicators” also are used within the viewport to provide visual cues regarding where other users are drawing or creating content on the canvas. Tapping on an activity indicator preferably performs one-time Sync View with the selected other user.

Abstract: Several methods are described herein to allow users to manage and synchronize views in a multi-user application with canvas (infinite or otherwise) and limited or unlimited zoom. Without these synchronization methods, coordinating views is very difficult, and may lead to chaos as one or more of the users gets lost on the canvas. A “View Sync” method provides for many-to-one synchronization, where many users are automatically synchronized with one user. A “Sync View” method provides for one-to-one synchronization, where one user is synchronized to another user's view. Preferably, off-screen “activity indicators” also are used within the viewport to provide visual cues regarding where other users are drawing or creating content on the canvas. Tapping on an activity indicator preferably performs one-time Sync View with the selected other user.

Abstract: Some embodiments detect a first condition for presenting a view window on a touch screen display, detect a first position of a fingertip on the touch screen display, and present the view window on the touch screen display at a second position based on the first position. The view window may provide a first view of graphical content presented under the fingertip on the touch screen display at the first position. The embodiment may detect movement of the fingertip from the first position to a third position, and move the view window accordingly from the second position to a fourth position based on the third position. The embodiment may update the view window to provide a second view of graphical content presented under the fingertip on the touch screen display at the third position. The embodiment may detect a second condition for removing the view window from the touch screen display.