Device, method, and graphical user interface for managing and interacting with concurrently open software applications

A method, comprising:

• at a first electronic device with a touch-sensitive display:
• while in a first mode:
• displaying on the touch-sensitive display a first application view that corresponds to a first application in a plurality of applications, wherein the first application view is displayed without concurrently displaying an application view for any other application in the plurality of applications;
• detecting a first input;
• and,
• in response to detecting the first input:
• displaying in a first predefined area an initial group of application icons that correspond to at least some of the plurality of applications;
• concurrently displaying at least a portion of the first application view adjacent to the first predefined area;
• and
• entering a second mode distinct from the first mode, the second mode configured for interacting with popup views and selecting one of the applications for display of a corresponding application view;
• and,
• while in the second mode:
• detecting, in the first predefined area, a first touch gesture of a first type on a first application icon that corresponds to a second application in the plurality of applications;
• in response to detecting the first touch gesture of the first type on the first application icon, displaying a first popup view partially covering at least the portion of the first application view and maintaining display of the first predefined area, wherein the first popup view has a horizontal resolution that is the same as a horizontal resolution that a full-screen-width view of the second application is configured to have when displayed on a second electronic device having a touch-sensitive display with lower resolution than the touch-sensitive display of the first electronic device;
• detecting one or more second touch gestures within the first popup view;
• and,
• in response to detecting the one or more second touch gestures within the first popup view, performing an action in the second application that updates a state of the second application.

A non-transitory computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a first electronic device with a touch-sensitive display, cause the device to:

• while in a first mode:
• display on the touch-sensitive display a first application view that corresponds to a first application in a plurality of applications, wherein the first application view is displayed without concurrently displaying an application view for any other application in the plurality of applications;
• detect a first input;
• and,
• in response to detecting the first input:
• display in a first predefined area an initial group of application icons that correspond to at least some of the plurality of applications;
• concurrently display at least a portion of the first application view adjacent to the first predefined area;
• and
• entering a second mode distinct from the first mode, the second mode configured for interacting with popup views and selecting one of the applications for display of a corresponding application view;
• and,
• while in the second mode:
• detect, in the first predefined area, a first touch gesture of a first type on a first application icon that corresponds to a second application in the plurality of applications;
• in response to detecting the first touch gesture of the first type on the first application icon, display a first popup view partially covering at least the portion of the first application view and maintaining display of the first predefined area, wherein the first popup view has a horizontal resolution that is the same as a horizontal resolution that a full-screen-width view of the second application is configured to have when displayed on a second electronic device having a touch-sensitive display with lower resolution than the touch-sensitive display of the first electronic device;
• detect one or more second touch gestures within the first popup view;
• and,
• in response to detecting the one or more second touch gestures within the first popup view, perform an action in the second application that updates a state of the second application.