Overtrace documentation
Everything you need to load your datalogs, overlay channels across modules, and pull real answers out of your telemetry. Guides are written against the actual app, so what you read here matches what you see on screen.
Getting started
- Getting started with OvertraceA 2-minute quick start for Overtrace: open the demo, load your datalogs, and overlay channels from multiple modules on one time axis — all in your browser.
- Loading your datalogs into OvertraceHow to load datalogs into Overtrace: supported file types, drag-and-drop, multiple modules, and how to read the confirmation toast (rows, channels, digital signals, skipped rows).
- Supported datalog formatsOvertrace supports Caterpillar, Waukesha, Emit, and Excel/CSV datalogs. Just drop your file in — the format is recognized automatically and the channels are plotted for you.
Working with data
- Overlaying channels from multiple modulesUse the Overtrace sidebar to overlay channels across modules: search across modules, expand/collapse groups, drag-select many channels at once, and clear all.
- The time axis, zooming, and panningSwitch the Overtrace X-axis between Actual time, Elapsed time, and Point #, set a From/To window, use quick ranges, zoom by dragging, and pan with the arrow keys.
- Aligning modules that started at different timesUse Overtrace's Align module offsets tool to nudge a module left or right so the same event lines up across logs that started at different times.
Analysis tools
- Point-to-point measurementDrop up to six measurement points in Overtrace to read exact values and deltas. Each point snaps to the nearest channel, so A and B can be different traces.
- Annotating events and locking the cursorMark events with draggable labels and freeze the crosshair readout at up to four spots in Overtrace to compare values across the chart.
- Per-channel Y-axis scalingSet auto or manual Y-axis ranges per channel in Overtrace, and assign channels to the left or right axis so small and large signals stay readable together.
- Drawing markup and capturing the viewDraw arrows, circles, boxes, freehand and text on the Overtrace chart, then move, resize, restyle or delete any drawing — and capture the view as a PNG.
Sharing
- Exporting and importing session filesSave your Overtrace chart as a portable .otsession.json file — trend view plus annotations and markups — reopen it later or send it to another licensed user.
- Synced windows — viewing two data sets in parallelOpen a second Overtrace window on another monitor to compare two data sets side by side. Cursor, zoom, x-mode, locks, annotations and measure points sync live.
Reference
- Keyboard shortcuts and chart gesturesAll Overtrace keyboard shortcuts and mouse gestures: Space to hide panels, arrow keys to pan, drag to zoom, drag-select channels, and double-click to reset.
- Privacy: how Overtrace handles your dataOvertrace parses datalogs entirely in your browser. There is no upload endpoint and your files never leave your device — privacy is built into the architecture.
- Troubleshooting common issuesFixes for common Overtrace issues: 'couldn't find a timestamp column', no numeric channels, skipped rows, dead sensors, and the chart looking empty after loading a file.