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Exercises

1.
  Add the -–V option.

2.
  Try -–R270/290/0/20 instead. What happens to the annotations?

3.
  Edit your .gmtdefaults file and change DEGREE_FORMAT to a number in the 0–-4 range.

4.
  Pick another region and change land color.

5.
  Pick a region that includes the north or south poles.

6.
  Try -–W0.25p instead of (or in addition to) -–G.