The Modify toolbar edits holes and KAD drawings — moving, re-aiming, setting heights, and
reshaping, combining and cleaning up lines and polygons. Open it from its tab on the right edge of
the window.

| Button |
What it does |
Other ways to use it |
Guide |
| Assign Surface |
Moves the collars of selected holes onto a surface |
Typed elevation when no surface shows |
Assign Surface and Assign Grade |
| Assign Grade |
Sets grade or toe from a surface, four ways |
Typed elevation when no surface shows |
Assign Surface and Assign Grade |
| Hole Bearing |
Re-aims holes by dragging |
Right-click the button for the pivot; hold F for focus mode |
Hole Bearing |
| Move |
Drags holes, drawings or vertices |
H / K / V decides what; Shift, hold S, Alt in 3D |
Move |
| Button |
What it does |
Other ways to use it |
Guide |
| Transform KAD |
Moves, rotates and scales drawings by exact amounts |
Escape restores; live preview |
Transform KAD |
| Reorder KAD Points |
Sets a drawing’s start point and direction |
Right-click clears; twice exits |
Reorder KAD Points |
| Offset KAD |
Offsets lines and polygons in or out, with a slope |
Stays on; right-click exits; up to 10 copies |
Offset KAD |
| Radii Holes/KADs |
Circles or stars around holes and points |
Toe location; union; starburst |
Radii |
| Router-Chamfer |
Rounds or bevels corners |
Right-click clears; twice exits |
Router-Chamfer |
Cutting and combining
| Button |
What it does |
Other ways to use it |
Guide |
| Clip-KAD |
Cuts drawings with a polygon — keep inside, outside or both |
Dialog stays open while you select |
Clip-KAD |
| KAD Boolean |
Union, intersect, difference or XOR of polygons |
All selected polygons mode |
KAD Boolean |
| KAD Join Lines |
Joins two lines end to end |
Join keeps the tool open |
Join and Split |
| KAD Split Lines |
Splits a line or polygon at vertices |
Right-click removes the last split point |
Join and Split |
Line editing
| Button |
What it does |
Other ways to use it |
Guide |
| Extend Line to Boundary |
Moves a line end to where it meets another line |
Right-click resets; twice exits |
Extend Line to Boundary |
| Grade Line (set constant slope) |
Sets a constant slope along a span |
Right-click steps back; with nothing picked, exits |
Grade Line |
| Simplify RDP |
Removes unneeded points |
Create Copy keeps the original |
Simplify RDP |
| Snap Objects to Surface |
Drapes drawings onto a surface |
Adds points where lines cross the surface |
Snap Objects to Surface |
Undo
Every Modify tool’s change is one Ctrl+Z step.