ƒ(x) provides possibility to set dynamically the value of a property using a function.
Screen and Visual Component properties can be used directly in the function.
Functions are continuously executed when a value used in the computation is change (e.g. the size of a Visual Component).
Functions can be created in the properties panel using f(x) button (hightlight 1 in screenshot below).
In some cases, f(x) button is in a dropdown menu (hightlight 2 in screenshot below).
Once a function set on a property, f(x) button becomes darker. To edit the function, click on it.
To delete the function, click on the red delete button
The goal of this exercise is to use a function to dynamically position the button 20 pixels below the title.