To edit the contents of memory, do the following:
The format you use to edit memory will be the same as the format of the column selected. For example, if you clicked in the ASCII column, you must edit memory as ASCII characters. If you are in hexadecimal 2-byte mode, and you click the formatted column, you must edit memory as 2 byte hexadecimal values.
A non-printing character is normally represented by a period (.) in the ASCII column. When editing in ASCII, however, non-printing characters are both displayed and modified using a special backslash sequence "\nn", where nn is the hexadecimal value for the character. The backslash character has the special sequence "\\" (a double backslash).
When you edit the contents of the memory in the text field, you are allowed to modify memory beyond the end of the current row. You can do this by simply adding more values to the end. For example, if you are currently displaying 8 bytes per row, and you click in the ASCII column, you might see "abcdefgh" in the textfield. If you change the contents to "1234567890", you will not only change the original 8 bytes from "abcdefgh" to "12345678", but you will also change the next 2 bytes to "90".