true,
Defines the dimension of the display window width and height in units of pixels. In a program that has the setup() function, the size() function must be the first line of code inside setup(), and the setup() function must appear in the code tab with the same name as your sketch folder.
reference from processing.org
https://processing.org/reference/size_.html
I’m currently using processing beta, this might be something that they are looking to change in the future.