I would like to see a seating configureation for TGV CDG to Lyon BEFORE making reservations. Is this possible? Also, can I "change" those seating reservations before departure at the station? Thanks!

Julie it seems to me they give you a choice of across from each other or beside when you book don't they?
BTW when we did the same trip we shared the car with the conductor. We booked first class car and nobody was there.

The ticket machines in the train stations change reservations in one minute. That's why they are marked "échange minute" on top.

Kerouac, I haven't been in Paris for 24 years...the "minute exchange" for reservations is new to me. Thanks for the tip.

Still wondering though is there any way to find out the seating configuration of a tgv car for a specific run, e.g., Paris to Lyon? I know this information is available for airplanes and thought it would be to for rail cars. Thanks again for the tips.

Unfortunately I have never been able to find a "seat map" for TGV trains such as those seat maps found for airplanes.

On the SNCF site, when you book a ticket, there is a place to click on "choose your seat" with basic options: isolated seat, seat facing the direction of the train, window, aisle, two seats next to each other or facing each other, upper or lower level, etc.