Sometimes when you open a palette, Colour Palette Editor may be unable to detect the exact format, for example 18-bit VGA, 24-bit VGA and Adobe Colour Table files are identical, but reading an 18-bit VGA as an Adobe Colour Table will appear quite different to how it ws intended. Colour Palette Editor will prompt on how to open the file if it finds multiple handlers for the same file format.
Click the Preview button to expand the dialogue to include a preview pane. When selecting a format from the list, the preview pane will be automatically populated with the result of opening the palette used the selected format.