Using Thunderbird

Hi, hope it's ok to ask here .... the Mozilla Forum is a right PITA, assuming there is one after looking for ages!

The Help tells you BS.. e.g. I want to enter multiple recipients to an email message and it says
Type a recipient directly into the address field, then press Enter. In the same line, just type another one and press Enter again. Note: Do not enter any comma or semi-colon between recipient items, as Thunderbird will handle the technicalities for you.

That's rubbish. Doesn't work. I'm sure this used to be easy and Enter brought up a new line and you could also see the address book. They must have removed this but you need to see the addresses to find ones you want.
Is anyone else in the same situation and worked out a solution?
Thanks.

Thanks essenbe
You're right. I have it sorted now. Looks like the instructions to use Enter (or comma or semicolon) between addresses is wrong, or for another version.