04 - Circuit Tools - macOS Graph
Graph Overview
The graph allows channel data for the selected laps to be compared. Channel values are shown for the graph cursor position.
Up to 3 channels can be selected at any one time, the Speed and Delta T channels are selected by default when the file is opened.
Just above the graph, a coloured bar shows where each split is in relation to the graph data. Clicking on a split will zoom the chart to that split.
It is possible to zoom to a specific part of the graph by left-clicking and dragging over the target area on the split bar.
Delta-T (Lap-time difference)
By far the most useful parameter for comparing Laps is the Delta-T channel. Delta-T is the running lap-time difference between two laps and gives a very clear indication of where time is lost or gained around the circuit.
At first, look for the largest changes in Delta-T and concentrate on these areas.
Sometimes, in a corner there may be a large gain followed by a large loss. This often happens when you enter a corner faster, but exit more slowly.
It is often surprising how much time you lose down the straight by exiting a corner a little bit slower than before.
Lap alignment - Time vs. Position
There are two ways of aligning comparison data: Time and Position. Position is the default X axis and this is the method recommended for comparing two different laps. Time is used in special circumstances. The alignment can be changed by clicking on the 'Settings' button on the top right of the screen.
Available Standard Channels
The selected channels can be changed using the ‘select channels’ button 
.
| Speed (km/h) | GPS Speed over ground |
| Delta-T (s) | Lap-time difference between two laps |
| Lat acc (g) | Lateral acceleration (cornering g-force) |
| Long acc (g) | Longitudinal acceleration (accel/braking g-force) |
| Combined g | Combined lateral and longitudinal acceleration |
| UTC time (s) | Co-ordinated Universal Time |
| Distance (m) | Rolling distance travelled since start of lap |
| Satellites | Number of satellites being tracked |
| Latitude | Latitude position in degrees and minutes |
| Longitude | Longitude position in degrees and minutes |
| Heading (°) | Vehicle heading in degrees |
| Height (m) | Height |
| Vertical velocity (m/s) | Vertical velocity |
Additional channels, such as CAN acquired channels, can be viewed by scrolling down within the popup menu.
Thumbnails
Thumbnails are shown above the graph and allow interesting parts of a lap to be identified quickly, such as when another vehicle is just ahead. Each thumbnail image is for the part of the graph level with the left side of the thumbnail. There is also a 'Current Position' indicator which let you know how far through the lap you are.
Thumbnails can be hidden using the 'show/hide' thumbnails button 
, or by using the 'Command + T' shortcut.
Changing the display mode
The 'Settings' button on the top right of the screen can be used to change whether all individual laps are displayed, or the whole session.
Controls
| Zoom |
Magic Mouse: Single finger swipe up/down Standard mouse: Wheel Keyboard: Up and down arrow keys |
| Pan |
Keyboard: Left and right arrow keys for large increments, Alt + Left and right arrow keys for smaller increments Magic Mouse: Single finger swipe left/ right Trackpad: Swipe with two fingers left/ right. Standard mouse: Left click and drag. |