So, copy & paste between session, usually used Window's clipboard. but, to copy longer than one screen, It's really hard. yes, there are auto-indenting problem too. And sometimes, I just want copy function definition or long variable names. between vim buffers I simply use visual selection. or cw/ciw. in this case, yanking by line is worse than clipboard. Last night I made this script saving current register to file supporting visual selection too. * ,y saves current unnamed buffer to ~/reg.txt file. * ,p / ,P read from ~/reg.txt and paste using p/P. In visual mode, ,y is yank and save.