Anyone know how to remove a sliding glass door and frame it in? I am removig two and need to frame wall in.?

I have a room that is three season with two rather large sliding glass doors that go out to the outside and I want to frame the whole thing in to make it energy efficient and useable space all year round. I have found sites that know how to remove the doors but they don’t tell me how to reframe the openings to make one continual wall. Help me please.