You can adjust your Menu Screen Size in this setting.
MENU > SETTING > SCREEN > TERMINAL > Scroll down to SALES SCREEN-RIGHT SIDE
AUTO for BY SCALING will automatically set up menu screen size to emphasize the menu item buttons.
It can also be adjusted BY WIDTH.
BY SCALING should be left blank if BY WIDTH is desired to use.
When WIDTH is set to be 820px
You do not have to worry about the bottom cutoff when defined BY WIDTH.