As an example I will also post the Splan circuit of the Wien bridge oscillator.
Here is the link : Wien bridge Oscillator
As you will open it, you’ll notice that I used a grey background which you can also use for your own circuits.
When you right-click it you can choose “Set to back” so it will be used as background.
The dimensions of this grey background is the exact dimension of an A3 Lectron ground plate.
This way, you’ll quickly see if the circuits fits and it will also be a guideline for other builders.