1. One or more computer-readable storage media having computer-executable instructions embodied thereon that, when executed, perform a method for altering a display state based on an input type, the method comprising: presenting, by a computing device having a processor, a memory, and a display component with an associated touch interface, a user interface configured to aid a user in constructing a text string based on one or more handwriting inputs, the user interface including a function key and a writing panel having a first area; detecting by the computing device via the touch interface, an initiation of a handwriting input in the writing panel having the first area; increasing the area of the writing panel to a second area larger than the first area, the writing panel having the second area overlying the function key so as to render the function key inaccessible; and receiving the handwriting input in the writing panel having the second area.