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when I run an analysis and get graphs, they are impossible to use because they are very low quality. How can they be improved?
you can go to the preferences and increase the resolution:
@Ksenia, ensure you're using vector graphic formats, such as emf on Windows or pdf on Mac. Raster formats, such as png and jpg, can become pixelated when increased in size, but vector formats do not have this problem.
When exporting images with File > Export, you'll find vector formats among the options. When copy-pasting into Word or Powerpoint, make sure to use the Paste Special option so that you can choose a vector format to be pasted. If you don't see a vector format in your options, you'll want to go to the JMP preferences (either the Windows or Mac OS preferences group, depending on your OS) and specify that your desired format be included on the clipboard when copying content inside of JMP.
You can learn more in this blog post: Getting High Quality Graphics Out of JMP.
That said, sometimes we may be forced to use a raster format (e.g., a file upload system accepts only png files), and in that case, hogi's recommendation regarding the DPI setting is a good one.
@Ross_Metusalem and @hogi, thank you both so much!