Alignment Zoom is a free application that navigates you to alignments at select chainages.
If you have an alignment of significant length, this is a very handy tool to focus on a particular chainage location along the alignment. As you type in new chainage values or step chainages using the arrows, the drawing zoom updates. As you change alignments the drawing zoom updates. There is a play button to scan through the chainages at a selected speed.
You will find Alignment Zoom located in the “Add-ins” section of the ribbon. Alternatively, you can run the command by typing “ALIGNMENT ZOOM” at the Command Line.