I can press the Quote button and transfer all the post
OK. But if I only want to use one paragraph,I end up with their whole
Just highlight, and delete, the part of the post you don't want to use.
For using the Multi-quote button:
At the bottom of each post, you'll see a blue
button that says +MQUOTE
When you click that button it will change to a red
button, that says -MQUOTE
For every post you want to quote, click the +MQUOTE
button, changing it to the -MQUOTE
When you have the ones you want to quote selected, click the ADDREPLY
This will bring you to the page where you compose your replies to posts.
You'll see all the posts you selected for quoting, already entered.
Just delete the part of the post that you don't want to quote.
Add your replies underneath the quote you're replying to.
When done, click the Add Reply button.
Be careful when deleting parts of the quoted text, to not delete the quote tags.