small window size and multiple windows not working

[Nikolay NIKOLAEV]

Dear Sirs,
I have the follwing problems:
when I start xwin the size of window is too small for me and I 
can not make it larger (it is 1/4 of the size of the whole window).
I do not see well and I have a problems when I have to work
with xmrace.
I can not start multiwindows regime also.
Can some one tell me how it can be done.
On my computer it does not work. The system is WINDOWS
NT 4
Nikolaev