Move your cursor at the very end of the wording you want to remove, and then press the large 'backspace' button at the top right of your keyboard. The cursor will then move backwards removing words. Obviously stop at the words you wish to keep, and reposition the cursor again to remove any further wording you don't want.
If you want to pick out one line, with a comment, then pick out another, with a comment...then you simply need to reinsert the quote again (underneath the box you are posting in is other people's previous comments....simply hit the '
Insert Quote button on the right hand side of the quote you want.
There is another way.......but I'd suggest having a go with that technique first, to see how you get on with it.
