How to align vertices on X,Y,Z axis to an other vertex or position

Problem:

Sometimes you want to align a vertex, or several vertexes on X,Y or Z axis to an other vertex. But when you choose the vertexes and scale to 0 on the axis that you want, it feels like it is choosing a random line to scale them all.

Solution 1 - Align to Active Vertex:

• Select your vertexes.
• Finally select the vertex that you want to use as reference for alignment because it should be the active element. It should have a different colour compared to other selected vertexes - depending on your Blender theme.
• On top, where you have your Transform Pivot Point options, choose active element.
• Now if you scale the the vertices with, for example, S + Z + 0, you will see that all of your vertices will be aligned according to the position of your, last selected, active vertex.

Solution 2 - Align to 3D Cursor:

You can achieve the same result with 3D cursor too. This let's you align your vertices to different positions other than the selected vertices. So it is useful too.

• Place your 3D Cursor to the reference point where you want to align your vertices.
• Again, on top, where you have your Transform Pivot Point options, choose 3D Cursor.
• Now if you scale the vertices like on the example above, on an axis, your pivot point or let's say reference point will be the position of your 3D cursor.

This second method is useful when you want to align your vertices to some other position other than a vertex, like to some edge, to some precise point, may be to some part of a face.