MATLAB enlarge 3D plot without enlarging colorbar

Is it possible to enlarge a 3D patch without altering the size of the colorbar? My original picture is like this one:

https://www.dropbox.com/s/xashny3w1fwcb2f/small.jpg?dl=0

I just want to enlarge the block in the middle of the figure keeping the colorbar unchanged. I used zoom(1.9) before, it is good but since I need to use a for loop to read sequential files to plot different graphs and make video, the graph became larger and larger so it seems that I need another method to enlarge the plot.