Is it possible to pass hexadecimal chars to edb-debugger?

I’m trying to find bad chars using edb-debugger. When I open the binary through file –> Open I add the string which causes the program to crash as program arguments value.

Anyway I don’t know how to pass hexadecimal values of bad chars through the GUI. As when I run the program the stacks shows all the list of characters as shown in the second image. Then I guess it takes them as single chars. Is there a way to pass hexadecimal values to edb?