This dialog box appears when a file is opened while the Detect All option is enabled for encoding selection. You can specify an encoding to open the file with.
To find more information about each control, such as a check box or a text box, select from the control list below, or click on the ? button in the upper right corner of the dialog box, and click on a control.
Encoding list box
Preview with text box
Open US-ASCII as System Default Encoding
Open Undefined as System Default Encoding
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