<p>When you rename a file, only the first part of the name of the file is selected, not the file extension (the part after the "."). The extension normally denotes what type of file it is (e.g. <file>file.pdf</file> is a PDF document), and you usually do not want to change that. If you need to change the extension as well, select it with your mouse, or press <keyseq><key>Ctrl</key><key>A</key></keyseq> to select the entire file name.</p>
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<p>When you rename a file, only the first part of the name of the file is selected, not the file extension (the part after the "."). The extension normally denotes what type of file it is (e.g. <file>file.pdf</file> is a PDF document), and you usually do not want to change that. If you need to change the extension as well, select the entire file name and change it.</p>
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<section id="valid-chars">
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<title>Valid characters for file names</title>
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not always a good idea.</p>
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</item>
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<item>
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<title>File name too long</title>
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<title>The file name is too long</title>
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<p>On some file systems, file names can have no more than 255 characters in their names. Use a shorter name.</p>