AutoCAD Tip: Dynamic Input (F12): Heads-up Cursor Entry for Faster, Precise Drafting

Dynamic Input keeps your focus at the cursor, reduces mouse travel, and speeds up precise entry. Press F12 to toggle it.

Why it matters

• Heads-up prompts and fields at your crosshairs eliminate back-and-forth with the command line.
• Direct distance and angle entry boost accuracy with fewer clicks.
• Cleaner workflows for common tasks like lines, offsets, moves, and edits.

Quick setup

• Toggle on/off: F12
• Drafting Settings: DSETTINGS > Dynamic Input
  • Enable Pointer Input (for X/Y or distance/angle at cursor)
  • Enable Dimension Input (editable distance/angle boxes after first point)
  • Show command prompting near the crosshairs (DYNPROMPT = 1)
• System variables
  • DYNMODE = 3 enables both pointer and dimension input
  • DYNPROMPT = 1 shows command options near the cursor
  • DYNPICOORDS = 1 defaults to relative coordinates after the first point

Fast, precise entry at the cursor

• Direct distance entry
  • Turn on Polar (F10) or Ortho (F8), aim the cursor, type a distance, press Enter.
  • Use Tab to switch between distance and angle fields when both are visible.
• Coordinates and angles
  • Type relative: @5,0 or @10<45
  • Type absolute: 100,250 (prefix # for absolute if needed, e.g., #100,250)
  • Use negative distances to draw opposite the cursor direction when helpful.
• Command options at the crosshairs
  • When you see options in the tooltip, type the capital letter (or full word) to choose it.
  • Example: For Fillet, enter R to set Radius without glancing at the command line.

Make it comfortable

• Units and precision: Set UNITS, LUPREC (linear), and AUPREC (angular). Dynamic Input mirrors these.
• Reduce clutter: In DSETTINGS, show only what you need (e.g., distance/angle) to keep the tooltip compact.
• Tracking synergy: Dynamic Input pairs well with Object Snap Tracking and Polar angles for clean, constraint-like drafting.
• Temporary Ortho: Hold Shift to momentarily invert Ortho while entering distances.

Troubleshooting

• No tooltip? Check F12, set DYNMODE = 3, and verify DYNPROMPT = 1.
• Fields feel “off”? Confirm UNITS, Polar angles, and DYNPICOORDS (try 1 for relative after first pick).
• Screen feels busy? Disable nonessential fields or temporarily toggle F12 in dense areas (e.g., hatch edits).

Pro workflows

• Use Dynamic Input to edit grips: hover a grip, then type precise deltas at the cursor.
• Combine with Quick Properties for heads-up geometry edits without leaving the drawing area.
• During layout work, lock view directions with Polar tracking and enter viewport scales right at the crosshairs.

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