How can you draw a straight line while marking up your drawing?

• A. Hold the SHIFT key while drawing
• B. Hold the CTRL key while drawing
• C. Use the Line Tool and fix the angle manually
• D. Draw, then press R to straighten

Answer: (A)

Constrained drawing to straight lines is achieved by snapping to fixed angles as you draw. Holding the SHIFT key activates this constraint in most drawing and markup tools, so the line you create stays perfectly horizontal, vertical, or at standard angles rather than wavering as freehand. This makes your markings clean and precise, which is especially important for outlining edges or alignment on drawings.

The other options are less efficient for this purpose: using the Line Tool and then adjusting the angle manually adds extra steps and can still be imprecise; drawing freely and then straightening afterward relies on post-processing that may not align perfectly with your markups; and the CTRL key typically serves different functions (like copying or additional commands) and doesn’t reliably constrain angles in most programs.