arttracinglightboxtablet

Using a Tablet as a Tracing Light: The Free White Screen Method

Published April 15, 2026

A tracing lightbox lets you see through paper to trace or transfer an image underneath. Commercial lightboxes cost $30–$150, but if you have a tablet or monitor, you already own one — you just need the right screen.

Why a screen works as a lightbox

A lightbox works by shining light upward through a translucent surface. Paper is semi-transparent: when light comes from below, it passes through enough to make an image underneath visible for tracing.

A modern tablet or monitor backlight outputs far more than enough light for this. An iPad at maximum brightness can push 600 nits or more — comparable to a dedicated A4 lightbox. Most Android tablets and laptops produce similar output.

The only requirement is a uniform white screen with no UI elements visible — which is exactly what the tracing light tool provides.

Step-by-step: how to set up your device as a lightbox

What you need:

  • Any tablet, laptop, or monitor
  • Thin paper (75–90 g/m² copy paper works; tracing paper works even better)
  • Your reference image (printed or on a second device placed under the paper)
  • Optional: masking tape to keep paper in place

Setup:

  1. Place your device flat on a table, screen facing up. Prop a laptop on its back; lay a tablet face-up.

  2. Open the tracing light tool on your device.

  3. Tap “Open Tracing Light” to go fullscreen. The screen will fill with bright white.

  4. Place your reference image directly on the screen (if it’s a printed image), then lay your tracing paper on top. Alternatively, display the reference on a separate device placed under the tracing paper while using your main screen for light.

  5. Tape the corners of your paper to prevent shifting as you trace.

  6. Adjust brightness using the in-tool slider to a comfortable level. Very high brightness is not always better — it can cause glare and eye strain.

Using the grid overlay

The tracing light tool includes an optional alignment grid. Enable it by tapping “Grid: Off” in the on-screen controls. The grid displays faint lines at regular intervals, which helps with:

  • Aligning your paper before you start
  • Scaling and proportion checking
  • Grid-transfer drawing methods (enlarging or reducing images)

Which paper works best?

Tracing paper is ideal — it’s specifically designed for this use and transmits light well. 60–90 g/m² tracing paper is easy to find at art supply stores.

Copy paper (80 g/m²) also works adequately. Hold a sheet up to a window — if you can see your hand through it, you can use it for tablet lightbox tracing.

Heavier paper (110 g/m² and above) becomes increasingly difficult to use. At 120+ g/m², even a bright tablet struggles to shine through enough to see a reference image clearly.

Tips for better results

Dim the room — Less ambient light means the backlight shows through more clearly, especially with heavier paper.

Clean the screen — Fingerprints and dust reduce light transmission and appear as shadows. Wipe the screen before placing paper.

Reduce brightness slightly — At 100%, an OLED screen can be intense enough to cause glare. Try 70–80% for extended sessions.

For large formats — A standard tablet gives you about an A4 drawing area. For A3, use a large monitor or laptop screen. An external monitor laid flat offers the largest lightbox area of any consumer device.

Warm vs. cool light — Most displays have a slightly cool (bluish) white by default. If accurate color rendering matters, enable “Night Shift” or “Warm Display” mode to shift toward a more neutral color temperature.

Does it work on phones?

Yes, though the working area is limited. A 6-inch phone screen gives you roughly an A6 drawing area — fine for small details, tight for larger work. Phones are most useful for tracing small logos, lettering, or design details.

Try it now

Open the tracing light tool, lay your paper down, and you have a lightbox in under 10 seconds — no purchase required.