You have to use the "url" window to paste, and you will have to learn the acceptable length of type that it will take at once. However, once you have your text segmented for pasting, you can add additional lines to the normal text type window at the bottom, and then put it into chat all at once. I'll be happy to meet anyone in chat to walk you through it.
Here is some information I typed up for another chat hoster:
You need a few windows open for the technical...
the way I do it is
type it or scan it into a document as text. Make some different colors so you can keep your place, and if you wish to make them in color in the chat too, then use the ` and the letter that corresponds to the color in chat server.
I cut and paste. Use the URL pasting window. You will need to practice to see how long a sentence it will take in one swoop, and also double check once you posted it up, to be sure. I move the window to where it is easier to "reach", and not up at the top of the screen (where it shows up for me normally.)
Then you have to highlight the text and ctl c it
from the text document, go to the chat window, make sure your cursor is clicked on it, ctl v it and then enter (that will place it into the normal text bar for chat. Hit enter again.
There are 2 ways to do it, and you have to follow the sequence for either way and not mix them.
If you use "SEND" in the chat window, well, for me, it messes me up. I hit enter, enter and it flows. (I think.)
You have to add all the BOLD CAP COLOR etc into your text. If you go up to the top of the chat options, INFO ??? and then REAL CHAT ??? (ok stretching my brain to remember) anyway, you will find the commands for color, italics etc. But if you place your text in Bold for regular chatting, it will hold it.
I find a count of 10 after I post something, considering it's length is limited by the URL window, that is enough time for the average person to read it. So I post something up, go get the next line, and hold it in the text bar window, count to 10 and then post the new up. Or something like that. Slower readers require up to 30 seconds, and replies nearly a minute! It seems like an eternity, just remember they are thinking and typing on the other end, it's only YOU who is waiting lolol