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Click File > Open.
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From the Files of type list, do one of the following:
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Select Spec files (*.isf).
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Select .psr files.
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Navigate to the specification file that you want to edit, and click Open.
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Click inside each field that you want to edit and do one of the following, as available:
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Type a new entry, or edit the existing data.
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Select values from available lists.
If you click the unit of measure fields for Pressure Max and Oper., select values from the Select Unit of Measure dialog box that opens.
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Do one of the following:
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Click File > Save. This option is available only if you loaded an .isf file.
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Click File > Save As, and in the dialog box that opens, change the existing file name or type a new name, and then click Save.
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The tag number field is never enabled for editing in External Editor. If additional fields that you need to edit are disabled, see Protect Fields Before Exporting Specs to External Editor in the help.
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If you are editing a file with the older .psr suffix, the software automatically converts it to .isf format upon saving. To perform this conversion in batch mode, see Convert a Batch of Specification Files to ISF Format.