How do you align the base of a box to another so that they are both on the same level ? For that matter how do you align the TOP of any models so they are top aligned as well ?
You can enable vertex snapping. Then, hit G (move), hit Z (lock axis), hover mouse on reference vertex and left click.
First of all, thank you for the screenshot, that’s a lot of effort !
What if say it is a very DENSE model and you want to top align it ? Not to a particular vertex, and also not practical to zoom all the way in to select the top most vertex.
You just want to align the top of the model to another along say the Z axis ? In 3DS Max you have top align/minimum align.
Blender is not 3ds Max - it’s best not to expect it to be. You can go to Object menu in 3d viewport’s header, then Transform > Align Objects, or you could just hit space and type ‘align’. There will be options for the operation just after it’s performed at the bottom of the T panel or in the F6 menu. You can also hold Ctrl when performing transform operations to temporarily enable snapping if you do it with snapping. That’s a bit easier than to keep clicking the button on the interface.
Thank you 
“Blender is not 3ds Max - it’s best not to expect it to be.”
Speeches like this sounds very nice, but it would be like I am learning chinese, and put an orange in front of a teacher and say “What is this in chinese ? In English we call it an orange” and the teacher replied “Chinese is not English, do not expect it to be” and proceed to say how it really is spoken in Chinese.
The teacher could just skip the part where it says don’t expect chinese to be english…unless the teacher have chip on his shoulder he needs to rub.
You got me. I don’t like 3ds Max. Anyway, hope Align Objects function works for you.
It does, thank you very much and I do appreciate it
instead of vert then use face
and align one face to the other bottom face
but need to move sideway afterward
happy bl