:reg - show all registers
:reg asdf - show only registers "asdf"
"ayy copy into register "a"
"ap paste from register "a"
Registers "123456789" contains the deleted lines in descent order.
The most WOW thing I've just discovered: macros are stored in registers! So you
can qw to record a macro into the register w, then do "wp - paste the
content of the macro into the current line, then edit it, do "wdd to "delete"
the macros back into the w register, and apply it as usual with @w.
Short video(4m33s) with examples on