There are two kinds of SAPgui buffers:
Presentation buffers
Also known as Screen buffer or Dynpro buffer. Stores the generated screens (DYNPRO loads). The presentation buffer is adjusted by changing its instance profile parameters.
Menu buffers
Also known as CUA buffer. Stores objects from the SAPgui. For example, menus, pushbutton definitions. These objects are from tables D345T (CUA texts) and D342L (CUA loads). The buffer has directory structure and supports LRU displacement. The menu buffer is adjusted by amending its instance profile parameters.
