gmtset - To change individual GMT default parameters


      gmtset PARAMETER1 value1 PARAMETER2 value2 PARAMETER3 value3 ...


      gmtset will adjust individual GMT defaults settings in the current
      directory's .gmtdefaults file.  If no such file exists one will be
      created.  The main purpose of gmtset is to temporarily change certain
      parameters inside a shellscript, e.g., set the dots-per-inch to 600,
      run the script, and reset to 300 dpi.

      PARAMETER value
           Provide one or several pairs of parameter/value combinations that
           you want to modify.  For a complete listing of available
           parameters and their meaning, see the gmtdefaults man page.


      To change the dpi to 600, set anotation font to Helvetica, and select
      grid-crosses of size 0.1 inch, try

           gmtset DOTS_PR_INCH 600 ANOT_FONT Helvetica GRID_CROSS_SIZE 0.1i


      gmt, gmtdefaults

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