Getting rid of the edge between to joint surfaces

Hi I would like to know if possible to avoid this edges once joined different surfaces.
Thanks a lot!!!

Hope its possible.

Hello,

It will work as long as the surfaces are planar.

http://docs.mcneel.com/rhino/5/help/en-us/commands/mergeface.htm

http://docs.mcneel.com/rhino/5/help/en-us/commands/mergeallfaces.htm

Be careful when running it on complex geometry - I have lost many a file to MergeAllFaces when I forgot to saveā€¦

-Sash