The memory panel is located in the lower right corner of the main window. It can be resized by clicking and dragging on either the top border or left border. In addition, it can be minimized by selecting the the minimize button in the upper right corner.
The format of the content of the cells can be set by selecting Edit->Preferences from the main menu bar (see Preferences help section).
The search field and button can be used to search the content of the memory cells. Currenly the values displayed are those at the end of the MMIX program's execution. (Future releases of Visual MMIX will show values for breakpoints).