tramp X forwarding howto

[Paul K]

Hallo people.

I visit remote directory of my linux box.
I want to run some X application for some remote file, but I get some error
message:

Gtk-WARNING **: cannot open display:


My *Messages* buffer also tells:

Tramp: Sending command `exec ssh -q   -o
ControlPath=/tmp/tramp.29890nH.%r@%h:%p
-o ControlMaster=yes -e none RHEL6-64'

`RHEL6-64' is the name of my remote linux box.

I do not see `-Y' argument in the ssh command. Is this the reason?

how can I instruct tramp to use this argument ?

best regards,