What about left to right direction? (horizontal layout)

[yarcowang]

The default exported image is from up to down. So, when the dependence packages go large, the width of the image goes wide.
I think it would be better to make it left to right (Or you can do an option), at least as a tree, the depth wouldn't go so far. It is more convenience to scroll from up to down than scroll left to right...
( :) a lot of directions may not confuse you )

[clue]

@yarcowang Thank you for reporting! I agree that this feature makes perfect sense.

It looks like #38 implements this feature, so I'll look into this soon-ish