OK things to do(remember to turn OFF the game completely before):
1. Go to your game folder => Perfect World\element\userdata\Layout
2. Open *number*.INI file, which *number* is your character number(each character have different) it's easy to find your number checking \msg folder which keeps logs of chat but for what we want we probably want to open them all(to change all characters).
3. FIND
Win_ChatBig_x = xx.xxxxx
Win_ChatBig_y = xx.xxxxx
where xx.xxxxx is ofc numbers, most likely differen't for everyone of us :3
and change to some bigger values for example
Win_ChatBig_x = 1132.081219 (i just put mien to 1500.000 on both)
Win_ChatBig_y = 1165.753426
(works good for me) It seems small but it's not exact resolution much smaller numbers should be ok, probably the less the better but no side effects for me at such numbers. Basically what you will do is setting the window to be set outside of visible resolution which actually makes our new problem go away.
4. Save the file and turn on the game clean of new window.
5. Remember what you changed couse this window MAY be something usefull in the future.
(copied from pwi forums blah blah)