You need to change the window size of the VI, you can do this by going to the LabVIEW menu:
File >> VI properties Then Category >> Window Size Under Minimum Panel Size specify the dimensions. After closing this you need to resize the VI window manually anything down to the previous specified dimensions. When you run the program the window size will be what it is currently in development mode. One thing to note also is that When you save the VI it will store its size also, which it uses when you reopen it.
