1. Under the View menu, select Exceptions.
2. In the Hole exception view, from the drop down list, select Hole proximity.
3. Along the top of the screen, the proximity threshold can be set using the Threshold text box either by typing in a value or using the up and down arrows.
From there all holes that trigger that value set in the threshold box will be highlighted on the plan.
4. The hole measurement tool can then be used to view the highlighted blast holes to assess the distance between them.