How to snap and align 2 objects Hi!
I'm a beginner learner and I'd like to know how to snap these three objects. I'd like to snap the two cylinders with the different faces of the cube. The short one on the left and the highest cylinder on the top of the cube. I'd like to have the center of the cylinder aligned with the center of the cube (the base of the cylinder inscribed into the face of the cube) 
I'm sorry for bad explanation
I hope someone can help me 
Thanks! 

I add a screenshoot in which you can see what I have to do 

Thanks again if someone can help me with this!
I don't know if there's a faster way:

Put the origin of the object you want to snap on its bottom face (first in Edit mode select the face, put the 3D cursor on the face with a Shift S &gt; Cursor to Selected, then in Object mode set the origin to the 3D cursor (header menu bar &gt; Object &gt; Set Origin).



Enable the Snap with these options: Face mode / Align Rotation to Target / Project Individual Elements.



Snap the cylinder to the face you want.



To align the cylinder with the cube, select the cylinder, then the cube. The cube being the last selected, it is said &quot;active&quot;, it has a yellow line all around.



Go in the header menu bar &gt; Object &gt; Transform &gt; Align Objects.



In the Operator box (bottom left) choose Relative To &gt; Active and the axis you want your want your object to be aligned with (press Shift to select 2 objects.