@Mikey-101234, this is what I do.
Plans for most FT planes are here:
Sponz Plans Index. Dan Sponholz draws them up from the original FT laser cut file and posts them there. Sometimes he's a few weeks behind the original release date, but they always show up.
I either print them at Staples, or at home. At Staples you can use Dan's "full size" plans and print them on big sheets of paper. You want to order blueprints or engineering drawings. Much cheaper than printing a poster. At home you can print the "tiled" plans and tape them together.
If I plan to build the plane more than once, I use 3M Super 77 spray glue and stick the plans to posterboard. Then cut that out, and you can trace around it onto foam board. I poke little holes along the lines that aren't the outside edge, then connect them with a ruler.
If you just want to use it once, you can stick the printed plans directly to foamboard. Either use Super 77 and follow it's instructions for a temporary bond, or use a more temporary spray glue, or glue sticks..