Text Elements Without Names in sapscript

Source:http://help.sap.com/saphelp_nw70/helpdata/en/d6/0db74a494511d182b70000e829fbfe/frameset.htm

Nameless text elements or default text elements are those text lines and control statements that appear at the beginning of the corresponding window contents without having the /E paragraph format. They include all lines up to the next /E paragraph or to the end of text if no other named element follows. Thus, you can have only one nameless text element in each window.

The differences between named an nameless text elements are:

The system outputs named text elements only if the print program explicitly calls them in the function module WRITE_FORM. But it outputs nameless text element automatically whenever it processes the corresponding window.
The nameless text element of the MAIN window appears only once at the beginning of the main window. It does not appear on the subsequent pages of the form which also contain the main window.
The nameless text elements of all other windows (except MAIN) appear each time.