Distribute objects vertically

I select crowded object on the canvas and try to distribute them pretty.

We have this has
And want this
But button (noted via white arrow) does only tiny adjustments.

Is there a command to evenly distribute crowded objects?

And where to read the documentation for Selection=>Align=>Destribute object vertically button?

Thank you for any suggestions!

Step 1

Step 2

And you get

There has to be enough room inside the alignment rectangle for all the components. Move just one of them down (or up) and try again.