I have a file from a mainframe where one field appears to be free form and has "special" characters in it. Is it possible, if I highlight the characters, to see what they are, in hex so I can search on all and delete them and report them to the mainframe people?
Pointing to individual control and non-printable characters should display the hex code in a tooltip, e.g. "SOH (^A = 1 = 0x1)", but this can be fiddly.
Alternatively, you can open the file in hex view by selecting the File format as Binary in the Open File dialog.