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# Problems with display of GMT PostScript

GMT creates valid (so far as we know) Adobe PostScript Level 1. It does not use operators specific to Level 2 and should therefore produce output that will print on old as well as new PostScript printers. Sometimes unexpected things happen when GMT output is sent to certain printers or displays. This section lists some things we have learned from experience, and some work-arounds.

- PostScript driver bugs
- Resolution and dots per inch
- European characters
- Hints