The QSlide feature displays the calculator panel in a moveable window in the foreground while allowing you to access other phone features in the background.
Tap in the upper right corner to close QSlide.
Tap the QSlide icon in the upper left corner to return to the Calculator application.
Drag the bottom right corner to resize the Calculator QSlide panel.
Touch and hold the title bar to move it to another position on the screen.
Drag the circle on the transparency bar to the left to make the QSlide calculator window transparent allowing you to access the screen functions underneath it. Drag it back to the right to use the QSlide window again.
To close the QSlide window, tap in the upper-right corner of its title bar.