AutoCAD Entity Selection Methods

Context

  • Video focuses on how to select entities/objects in AutoCAD.
  • No dataset supplied; users can either watch or draw sample geometry in a new template file.
  • Up to this point in the course, selection happened only inside modify commands; now the instructor details every standalone selection technique.

Noun–Verb vs. Verb–Noun Workflows

  • Noun → Verb: Select objects first, then launch a modify tool.
  • Verb → Noun: Start the modify tool first, then create a selection set (method used throughout the video with the Erase command).
  • Choice is controlled in Options → Selection; both workflows can stay enabled simultaneously so you can switch on the fly.
  • Practical tip: Choose the style that feels fastest in a given situation—there is no “one-size-fits-all.”

Basic Pick Selection

  • Launch any modify tool (e.g., Erase).
  • AutoCAD replaces the crosshair with a Pickbox.
  • Hover over geometry ➔ entity highlights ➔ left-click adds it to the selection set.
  • End selection:
    • Press ⏎ (Enter) to commit and execute the command.
    • Press Esc to cancel and leave geometry intact.
  • Even with no command active, the crosshair always includes a Pickbox for single-click selection.

Window (Blue) vs. Crossing Window (Green)

Window Selection (blue, solid outline)
  • Activate during a command with W ⏎.
  • Drag left → right (or bottom → top-right).
  • Only objects completely enclosed in the rectangle join the set.
  • Preview: items turn gray before selection is confirmed.
Crossing Window (green, dashed outline)
  • Activate with C ⏎.
  • Drag right → left (or top-right → bottom-left).
  • Any object that is touched or crossed by the dashed boundary is selected—full containment not required.
No-Command Windows
  • With no tool active, simply click-drag to form a Window (blue) or Crossing Window (green) just as above.

Lasso Selection

  • Start a click-and-hold drag (no command required).
  • Left-to-right drag ➔ blue Window Lasso (full containment rule).
  • Right-to-left drag ➔ green Crossing Lasso (touch rule).
  • Good for irregular areas, but can be hard to visualize while drawing free-hand.

Polygonal Windows

Window Polygon (WP)
  • Command in progress ➔ type W P ⏎.
  • Click sequential points to form any multi-segment shape; only objects fully inside are selected.
  • Finish the polygon with ⏎.
Crossing Polygon (CP)
  • Type C P ⏎.
  • Green outline with dashed segments; anything touched joins the set.
  • End with ⏎.

Fence Selection

  • Command in progress ➔ type F ⏎.
  • Drag a continuous poly-line “fence.”
  • Objects are selected only if the fence line intersects them.
  • Unlike Windows/Polygons, no area is filled—just the line path.
  • Must press ⏎ to complete and apply.

Completing a Selection Set

  • Always click the final point (for Windows) or press ⏎ (for Polygon/Fence) before pressing Enter a second time to execute the modify command.
  • Forgetting to close the selection prematurely can result in missed objects.

Selection Cycling (Advanced / Usually OFF)

  • Found in the status-bar “hamburger” menu ➔ enable Selection Cycling.
  • Icon shows two rectangles (one green).
  • With overlapping entities inside the Pickbox, two stacked rectangles appear; a dialog lets you choose exactly which object you want.
  • Instructor recommendation: Keep it off for this course and most workflows.
  • Use it only on crowded drawings with coincident lines or stacked layers where single-click precision is impossible.

Practical & Workflow Tips

  • Escape (Esc) twice quickly to both cancel a command and clear any lingering selection.
  • Combine selection methods: start with a large Crossing Window, then Shift-click to remove accidental picks.
  • Keep an eye on color-code:
    • Blue = Window (full inside).
    • Green dashed = Crossing (touch rule).
  • Lasso and Polygon tools are ideal for unusual shapes around complex geometry (architectural floor plans, mechanical assemblies).
  • Window vs. Crossing is faster than clicking dozens of line segments individually—use them to speed up daily edits.

Connection to Earlier Lessons

  • Earlier modify tools auto-prompted for selection, but did not require knowledge of advanced window types.
  • Understanding all selection variants improves efficiency with Move, Copy, Rotate, Scale, Mirror, Array, and Erase commands taught previously.

Next Steps / Practice Suggestions

  • Draw overlapping circles, rectangles, and stacked lines.
  • Try each selection method and observe what is or isn’t captured.
  • Toggle Selection Cycling once to see the dialog, then disable it.
  • Memorize short-cuts: W, C, WP, CP, F to switch instantly during command prompts.

End of notes—review and practice each technique to build muscle memory before moving forward.