1.3 Inquiry Commands & Draw Order

Why Inquiry Commands Matter Before You Draw a Single Line

Before the five official objective domains ask you to draw, edit, annotate, or plot anything, Certiport's objective domain outline lists inquiry commands and draw order as prerequisite knowledge. That placement is intentional: inquiry commands are how you verify your own work and investigate someone else's drawing, and draw order is how you keep overlapping objects from hiding the information a viewer (or a grader) needs to see. You'll use both constantly across every other domain in this guide, so it's worth building fluency here first.

LIST — The Full Property Dump

Type LIST (or select an object and use the Properties panel's more detailed cousin), select one or more objects, and press Enter. AutoCAD opens a text window reporting every relevant property of the selected object(s):

• Object type (Line, Circle, Polyline, Hatch, and so on)
• Layer assignment
• Color, linetype, and lineweight (including whether they're set "ByLayer" or overridden)
• Geometric data specific to the object type — a Line reports its endpoints and length; a Circle reports its center, radius, circumference, and area; a closed Polyline reports its vertices and enclosed area
• Space (model space or paper space) and, for 3D objects, elevation and thickness

Use LIST whenever you inherit a drawing (or a practice file) and need to understand exactly what an unfamiliar object is — is that line actually on the correct layer? Is that circle really the radius the task specifies? LIST answers those questions definitively instead of relying on a visual guess.

ID — Pinpointing a Single Coordinate

The ID command answers a narrower question: "What is the exact coordinate of this one point?" Run ID, then snap precisely to a point (almost always using an object snap like Endpoint or Center — clicking freehand defeats the purpose), and AutoCAD reports the X, Y, and Z coordinate value in the command line.

ID is especially useful for two workflows tested on the exam:

1. Confirming placement accuracy — after drawing or moving an object, use ID on a known point to verify it landed exactly where a task specifies (for example, confirming a corner sits at 0,0 or at a specific offset).
2. Setting a temporary reference — running ID on a point updates AutoCAD's "last point" memory, which you can then reference in a subsequent command using the @ relative coordinate syntax, effectively using ID to stage a base point for what comes next.

DISTANCE — Measuring Without Committing

The DIST command (accessible through the newer MEASUREGEOM command's Distance option) asks you to pick two points and reports the straight-line distance between them, along with the angle in the XY plane and the change in X, Y, and Z. Critically, DIST creates no object — it's a pure measurement, which makes it the right tool whenever a task requires you to verify a dimension rather than place one.

A common exam-relevant distinction: if you need a permanent, visible dimension on the drawing, you use one of the dimension tools (linear, aligned, and so on, covered in the Annotation domain). If you just need to personally confirm two points are the correct distance apart before moving on, DIST is faster and doesn't clutter the drawing with an annotation you didn't need.

AREA — Enclosed Regions and Perimeters

The AREA command calculates the enclosed area and perimeter of a shape defined either by picking a sequence of points around its boundary or by selecting a closed object directly (a closed polyline, circle, or region). AutoCAD reports both the area (in square drawing units) and the perimeter (total boundary length).

Two practical notes that matter for accuracy:

• If you pick points manually rather than selecting an object, you must pick them in order around the boundary — skipping around produces a nonsensical, self-intersecting area calculation.
• AREA also supports Add and Subtract modes, letting you calculate a compound area (for example, a room's floor area minus a column footprint) by adding the outer boundary and subtracting the inner one in a single running total.

Draw Order — Controlling What's On Top

Every object in an AutoCAD drawing has a position in a stacking order, much like layers in image-editing software. When two objects overlap, the one higher in the stacking order displays (and plots) on top, potentially hiding what's beneath it. The DRAWORDER command (also reachable via right-click > Draw Order on a selected object) lets you control that stacking explicitly with four options:

Where Draw Order Actually Bites You

Draw order problems are easy to overlook while drawing and painfully obvious once you print or plot. The most common exam-relevant scenarios:

• Solid hatches: A solid or dense hatch pattern applied after linework can visually cover the boundary lines and any text sitting on top of the hatched region unless it's explicitly sent to the back.
• Wipeouts: The WIPEOUT object is specifically designed to mask geometry behind it (useful for cleaning up a crowded detail), but a wipeout left at the wrong draw-order position can accidentally hide objects you still need visible — always verify a wipeout's stacking position after placing it.
• Inserted images and PDF underlays: Raster images and PDF underlays often need to sit behind all vector linework; if a newly inserted image lands on top of your drawing, your linework can disappear from view even though it technically still exists in the file.
• Text and dimensions over hatches: annotation should typically read clearly above a hatch pattern, so if labels vanish into a hatched region, DRAWORDER (bringing the text to front) is the fix — not redrawing the text.

The practical exam takeaway: whenever something you know you drew correctly seems to be missing or obscured on screen, your first troubleshooting step should be checking draw order before assuming you made a drafting mistake.