Memory Window
The Memory  Window can be opened and closed by using the Debug4x Main Window's DebugView Menu or by the shortcut keys ctrl+M (think of memory). The Memory Window is used to inspect and modify emulator memory. 

A scroll bar changes the area of memory but the best way to navigate through memory is to type an address expression in the edit area then ENTER (example, type: 80711 ENTER to go at the address of the address of the home directory). 

Click in the hex display area and use the 0-9, A-F keys to modify memory data in hex.  Click in the ASCII area and type any valid character to modify memory using characters.

CAUTION:
Memory will be instantaneously modified when you type into either area.  If the emulator has not been stopped, results can be unpredictable!

Help Checkbox
Clicking the Help Checkbox will show a reminder window for address expressions.