Making a pillow - page 2
This ones :
the Y button we choose is to move what we will select just in the up and down (Y axis) positions without let them go to the left or right and to make them go to top or down

The left one will let you work with the object points or nodes, the midle one, the object lines and the one on the right will let you work with faces

the front button is to let us select just the front faces of the object.... we have a mesh so we have front and back faces

and this is the window selection tool (drag)
 
I'm still in top view

select the points like in this pic
 
check this button on the left and don't click on the screen  or you unselect the points you have selected before
 

now change to side view

and with the move button

drag the mouse up like in the pic (uncheck the X and Z buttons to move it just up and down)
 
now... again to top view and choose again the window selection tool  and select only this points
 
go again to side view and drag them up ... like this
 
now go to ortho view and change the view of the object in this button ... the default one
it looks like a pillow to you?
now this is the top side... we must do it all over again with the back button selected instead of the front one
then lets do it... go to top view again... and change the button on the left ...to back
select the first middle 9 squares as we did before.... you will not see them... they are hide

change to side view , make sure the selected nodes are the ones you want and choose the move button to drag them down... more or less the same measure you made before
Sometimes the back and front buttons doesn't work as it's supposed to, if so, you can always rotate the object. To rotate the object, go to the arrow mode   select the cube and then edit - rotate - X=180