A portable electronic device is provided. The portable electronic device includes a display, a memory to store a first set of applications and a second set of applications, the first set of applications and the second set of applications to be executed in a first operation mode and a second operation mode of a same operating system, respectively, and a processor. The processor is adapted to display a background screen and a first icon via the display, at least temporarily, while the portable electronic device is operated in the first operation mode, identify a first input received with respect to the first icon, display one or more rectangular indications on a first portion of the background screen based at least in part on the first input, each of the one or more rectangular indications indicative of an application of one or more of the second set of applications, identify a dragging input received with respect to a rectangular indication selected from the one or more rectangular indications, display a second icon corresponding to a respective application of the one or more of the second set of applications indicated by the selected rectangular indication on a second portion of the background screen where the dragging input is released, and execute the respective application based at least in part on a second input received with respect to the second icon.