Hi again,
As you have probably seen the forum engine is pretty antiquated, and not particularly user friendly. we have been promised an updated engine for many years, but recently have been told that it has been put well down the list of priorities at Haymarket who own the site.
Now the compilation box, lets try again.
There are two things you may need to do. Firstly you can expand the "Submit Forum Message" box in the conventional way by clicking the maximise symbol (White rectangle blue background) in the blue header bar. This now gives you the whole screen but still with only the small yellow working rectangle.
Secondly; In the bottom right-hand corner of the yellow rectangle, there are two small diagonal black lines that form an arrow head with the corner of the box. If you click and drag this arrow head the yellow box should resize.
Just type as normal, only use the 'carriage return/new line' to seperate paragrapghs, ans teh text will will automattically wrap round to fit the size of the box.
TIP:
Keep the box as narrow as it allows as that will be closest to the apperance on the actual forum.