Depending on the size of the plane, I usually pull up the plan on my computer and then crop out a significant part like a fuselage former, then I print to my inkjet printer at 100% scale. The part prints actual size, then I cut out the part and glue stick it to the wood and cut on my saw. I do this for each part with a unique shape. Larger shapes can be printed as tiles that you can piece together and then cut out. You can buy card stock heavy paper to print on to make the tracing a little easier.
I have also tile printed entire plans and then taped them together. Works OK for small planes but a large plane will print out on a couple of dozen pages. Better have plenty of tape, and big worktable!