How to Correct and Re-send new idoc # in WE19

Hi Expert

Can you please give me the steps to correct and re-send (new idoc) in WE19.

Here is the situation:

Outbound ASN failed in EDI for having special char in field ARKTX(E1EDK08-E1EDP07-E1EDP09-ARKTX).

Here I just need to remove special character from the material description. I found the value where i need to make changes but from that point I don't know where to go in the screen to save that change and generate new idoc #.

Please provide steps...

Thanks in advance for you help !

Thanks,

Darshak