Samsung Galaxy S4 User Manual page 36

To move the tab and tray to another side:
1. Display the Multi window tab. (See "To display the
Multi window tab and tray:" on page 27.)
2. Touch the tab to display the apps tray (containing the
scrollable apps).
Note: Notice that when the apps are visible, touching and
holding the tab turns it a dark grey. Its only then that you
can move the Multi window tray to another side.
3. In a single motion, touch and hold the Multi window
tab for approximately one-second to detach it from the
screen (1), then slowly drag it to its new location along
any other available screen edge (2). You can move it to
the top, bottom, or either side.
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