creo4 config.pro option documentation for: RASTER_PLOT_DPI 
raster_plot_dpi
Category: Printing & Plotting
Description: Determines the resolution for plotter outputs variables are in dots per inch.
Values: 100, 200, 300, 400
Default Values: 100
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Specifies the directory in which the system stores the backed up models. The primary default is the current directory. However, if that directory is read-only, the secondary default is the /tmp
directory.