QT Dialog box when building is cutting off my UI content, how do I resize the dialog box so this does not happen?

Question

Here is the example of what is happening. Above is the simple design of my UI, but below when I build my project, everything within is getting cut. What is the issue? I can't seem to find it despite trying to resize a bunch of my widgets.

This is what my QT dialog box structure looks like right now. Then in my main.cpp file I just had

w.setFixedSize(560,180);
w.setWindowTitle("Servo Control");

Answer 1

Update: I applied a grid layout to the outermost hierarchy and this fixed my problem. Strange though because the video I was following did not have any layout on it, but did not run into the same problem.