KB000437: What are the Steps to Modify the Decimal Point in the Quant Summary Report? - MS ChemStation 

It is possible to control the precision (decimal placement) for the amount column in the summary report. There is, however, no interface for this, you must edit the macro that produces the report. The summary report for G1701AA/BA (Enhanced and Enviro modes) is produced by HPCHEM\MSMACROS\EPA.MAC. To change the decimal placement in this report, edit the macro and change the format specification for CAL_PK_AMT to move the decimal as you like. Be aware there are several lines to change, corresponding to various print destinations. For details and an example (G1701AA), download the attached document. Be sure to save a backup copy of EPA.MAC before you make any changes.