How to dynamically change the text in Unity(Augmented Reality + NYARtoolkit(C#)) ?

I want to dynamically display text and change it during run time, i have tried Text Mash but aint able to get any results... BTW i am working on a Augmented reality project in unity with NYARToolkit... i.e if i change the parameter of a object eg. size, i want it to display the size of the new image as text while my project is running in AR.