Is it possible to make functional block diagrams as presented in the image below? I am just looking for simple boxes with arrows drawn to them, and some basic direction commands (above, below, left, right). If it is possible, them could someone please get me started with an example or a link to an example?
Your diagram has a lot of enforced layout : alignement, size, orientation.
So it will be hard to obtain the same rendering.
Here is what you can obtain in five minutes :
Tweaking the layout will be much much longer IMHO.