.PGM File Format
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| File Description | PGM is grayscale image file format developed by NetPBM project. Similar to PPM, it's can be stored in ASCII text format or binary format. PNG image files contain header information and an additional parameter that defines the different shades of gray from black (0) to white (up to 65,536). Each pixel in PGM image is represented in one or two bytes (8 or 16 bits). PBM is one of the image formats developed by the Netpbm project. Other Netpbm file formats include the portable pixmap format (PPM), and the portable bitmap format (PBM). They are also referred to collectively as the portable "Any Map" format (PNM).
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| How to Open .PGM Files |
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| PGM Programs | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| PGM Topics | File Extensions PGM Frequently Asked Questions None. |
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| Related Books | The Digital Photography Book | The Absolute Beginner's Guide to Taking Photos |
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| Source |  - Official File Extension Library | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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When you double click PGM files on computer, the associated program will be launched to open the selected PGM file. But you can change it to any program at your pleasure. a) Select a program to open PGM files on WindowsRight-click on the PGM file and go through 'Open with' > 'Choose default program'. In the pop-up windows, choose a program as the PGM file opener. If you decide to always open PGM files with the program, only check the option 'Always use the selected program to open this kind of file'.
b) Select another application to open PGM files on MacFirst Get Info about any one of PGM files by right-clicking or Command-I, and click 'Open with' arrow to choose a program to start your PGM file. Click 'Change All' button to set the selected application as the default PGM file opener app.
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How to select a program to open PGM files?
