how to snap several vertices to the same z.position I encountered a little problem. Say I have a mesh an the Vertices on top are not in the same Z-Position. I am looking for a method to have them all aligned in Z.

My approach is to select the 3 Vertices, grab the blue arrow to constrain the movement in the Z-Axis and want to snap to the vertex highlighted with the red circle.


My Snappingsettings 


But for some reason they don´t have the same z-Position. They seem to keep their Offsets to each other?

I used this method in Maya. 
Do you know a way how to get that working?

thanks in Advance
Guido.
You can select the vertices and then hit S+Z+0+Enter. Then they'll have the same Z-Position.

S is the shortcut key for "Scale". Z is the the axis to scale on and 0 is the amount to scale by.



Or, if you wanted to align the vertices to a specific vertex, you can:


Select the vertex you want to align to
Hit Shift+S and select Cursor to Selected.
Change the pivot point to 3D Cursor
Select the other vertices and hit S+Z+0+Enter.




Or alternatively (without the need to change the pivot point to 3D Cursor), you can


Select "Snap Element" on the 3D Header and select "Vertex"
Then select all the vertices except the one you want to align to
Hit G to grab
Then hit Z to constraint the translation to the Z axis
Hold Ctrl and hover the cursor over the vertex you want to align to until there's a circle over the vertex (don't hold Ctrl if the "Snap during transform" option is on)
Then click (or hit Enter)