From mathcad help:
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Controlling How Data is Written
Significant digits:
By default, WRITEPRN writes 4 significant digits to disk. You can change this by changing the value of PRNPRECISION. To do so, choose Worksheet Options from the Tools menu and go to the Built-in Variables tab.
Column width:
By default, WRITEPRN writes data in columns that are 8 digits wide. You can change this by changing the value of PRNCOLWIDTH. To do so, choose Worksheet Options from the Tools menu and go to the Built-in Variables tab.
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Also with colon equal you can set those values in the worksheet, like TOL value.
Regards. Alvaro.