7. Using Named Buffers

It is possible to copy or delete text from any file to a named
buffer, and to keep as many as 26 of those buffers around for
convenience. Buffers are created using lower case single letters.
Using upper case letter means append to the existing buffer.
The command beginning buffer operation is " (double
quotation mark). Following it is the name of the buffer and then
description of the operation to be performed:

"ay}   - yank (copy) from cursor to end of paragraph into buffer "a". 
         If buffer exists, overwrite it. 
 
"A12d  - delete 12 lines from cursor down and append it to the 
         existing buffer "a". 
"ap    - take contents of buffer "a" and paste it below cursor line. 

Notice that lower case name for a buffer causes it to be created every
time a command is issued.