To view the pin mapping for the block, click on link View pin map on the mask dialog of the Arduino® block. The Arduino Pin Mapping table appears.
Some peripherals reserve a set of pins while some other peripherals allow you to select a value from a range of pin numbers. This table helps avoiding conflicts while selecting pins for Arduino peripherals.
For example, to know the pins that you can select for the Analog Input block for Leonardo board, look for the Analog Input entry under the Blocks column vertically down and Leonardo board horizontally across.
You see 0 – 11 as the selectable pins for this block on the Leonardo board. You can select a pin in the range 0 to 11 based on your design requirements.