Comment by johnmc408

It allows you to move the cursor up/down w/o regards to the end of line. If you move the cursor up to a line and you are passed the end of line and you type 'c', then a bunch of spaces are added then the 'c'. Basically it allows you to move up/down and have the cursor stay the the same column instead of moving left/right to hug the end of line...I really like it :-)