Detailed instructions for working a group puzzle of type 'Martin'

This is a signature puzzle named 'Martin'

The 6 elements in each group of this type of puzzle are: M, A, R, T, I, and N.

Every group in the puzzle must contain exactly this set of elements.

Each row is a group numbered as shown in this Martin figure.

In a Martin puzzle, each row is a group numbered as shown in the figure above.

Each column is a group numbered as shown in this Martin figure.

In a Martin puzzle, each column is a group numbered as shown in the figure above.

Each 3x2 rectangle is a group numbered as shown in this Martin figure.

In a Martin puzzle, each 3x2 rectangle is a group numbered as shown in the figure above.