Modify
On the Mining | Blast Design tab, in the Modify group:
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Click Copy/Move (or use the option on the right-click menu) to copy or move the selected blasthole/row by a specified distance.
 
                                                
                                                
                                            
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Click Clip to clip blasthole lengths to a reference wireframe.
 
                                                
                                            
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Click Extend to extend blasthole lengths to a reference wireframe.
 
                                                
                                            
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Select Adjust | Adjust to Elevation to extend or clip the length of selected holes to a specified elevation or a fixed depth.
 
                                                
                                            
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Select Adjust | Adjust to Wireframe to extend or clip blastholes using a reference wireframe.
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Select Adjust | Adjust to Length to round the lengths of selected blastholes according to a final length value.
                                                 
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Click Show Table to toggle the display of the Blastholes table for the selected or active block.
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Click Edit Pattern Extents to edit the extents for a selected pattern in order to reposition it within the design.
                                                 
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Click Delete to delete selected (block or row) objects and their holes (if any).