Keypad is in "Switches" Component group.

It is customizable in size ( rows and columns ) and key labels.

By default it is an standard 12 keys; 4 rows, 3 Cols:

Each key label is only one character, to change key labels edit the corresponding property: "Key Labels".

Key Labels property holds an string representing all labels in keypad, one character per button, from left to right and from top to bottom.

Each button is a switch connecting corresponding row and column pins.
For example in the picture above button "6" is a switch connecting pin is second row (left side) with pin in third column (bottom side).