To transform a series of stations to a new coordinate system. Say from Local to OS, if a full 3d Transformation is not desired, then the 2d approach maybe required.
To start the process select the Stations that are to form the basis of the transformation, hopefully a coordinate block is also ready in the project with the same points, but with their new values. That saves having to type them in.
The there are two main 2d options. Point 2d and Coords 2d. Point 2d assumes you may want to just type the new coordinates in manually. Where as the Coords mode prompts the user to select the coordinate block that contains the new values. Though there is a Load button when using the Point mode, so that you can also load coordinates from a coordinate block that way as well.
The main different between the Point and Coord mode is that that the latter offers an "Adjust Heights" option as well. See below. When enabled the average dZ shift (between the old and new stations) is applied to the levels of the points as well. So adjusting not only the plan position but also the heights as well... Even though it is essentially a 2d transformation.
If a height shift is applied, then a report will pop up at the end identifying how the levels of each station have changed.