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In addition, you can configure JMP to always use GZ compression when saving by selecting Preferences > General > Save Data Table Columns GZ Compressed.
Note: The Compress file when saved option only decreases the file size. This command does not affect the memory required to analyze the data. To reduce both the file size and memory required for analyzing, use Cols > Utilities > Compress Selected Columns. See Compress Selected Columns.

Help created on 3/19/2020