Help with TFT LCD 3.6" OR 3.5"

Now I'm with a new problem.

From Library "MCUFRIEND_kbv-master"
I run the example "GLUE_Demo_480x320"

I'm trying to change the aspect, by adding the lines I did above, and does not work,
I'm trying to change the font size, and does not work, is there a command MidFont?
How can i do it?