One of my colleagues recently told me that she talks to a number of Target and Drillhole users who are not aware of, or have forgotten about, a really useful option to "Replot Holes on Existing Plan or Section".
The Replot Holes option has fewer parameters than the standard Plan and Section tools. It only updates the drillhole groups and does not overwrite or create a new map. This makes it useful for tasks such as adding proposed holes that were added to the project or updating the data being plotted along the trace when new logs or lab results are ready.
