When scanning, each scanned document is converted to the US Letter format. This means an originally A4-sized sheet is shrunk and gains borders. This is problematic because I am a geometry teacher, and when a student draws a line of, for example, 7 cm on their A4 sheet, the internal Goodnotes ruler only reads 6.3 cm. This is inconvenient. I would like to be able to set the format to A4 during scanning so that all real lengths can be accurately measured by the Goodnotes ruler.