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Tracings consist of copies or recordings of lines, shapes, or signals produced by following an original source or by capturing a waveform. The term is used across disciplines to describe both manual drawings and data traces.

Manual tracing involves transferring outlines using tracing paper, a light source, and a pencil; in art and illustration it aids accuracy or pedagogy. Digital tracing encompasses vectorization of raster images, where software converts outlines to scalable paths, or manual digital tracing with tablet input. In science and engineering, tracing also refers to recording measurements such as graphs of voltage, heart activity (ECG tracings), or brain activity (EEG tracings).

Applications of tracings span several fields. In art and design, tracing facilitates replication and study of forms. In biology and anatomy, tracings are used to describe shapes of specimens or organ outlines. In cartography, tracing is used to reproduce map features. In electronics, traces or signal traces describe conductive paths on circuit boards, and tracings can refer to recorded electrical waveforms used for analysis or documentation.

Evaluation and ethics: Accuracy, scale, and distortion are assessed by comparing tracings to the source; calibration of instruments and careful alignment are important. When reproducing artworks or documents, ethical and legal considerations apply, including respect for copyright and provenance.

History and prevalence: tracing has a long history from handmade tracing papers to modern digital vectorization, making it a common technique across creative, scientific, and technical fields.