Complete Guide to Using the Mouse in PrestoPlot

PrestoPlot is designed for smooth and fast interaction, where the mouse plays a central role. This guide details all possible mouse actions, grouped by usage context (where you click) to make learning easier.

In the "Dataset" Window

The "Dataset" window is your starting point. This is where you select the data to visualize.

Button	Action	Result
Left Click	Single click on one or more datasets	Selects the datasets for a future action.
Right Click	Click on a selection of datasets	Opens a context menu to: • Create a new chart (\New Graph). • Edit the attributes of the dataset (name, unit, etc.). • Access calculator shortcuts (e.g.: \delta\, \delta_t).

In a Graph window

This is the main interaction space for visual analysis of your data.

Button	Action	Result
Left Click	Click on a curve	Displays the coordinates (value and time) of the point closest to the cursor.
	Hold left click + move on the graph	Allows you to move the graph (Pan).
	Hold left click + move on an axis	Allows you to move along the axis (Pan).
Right Click	Click in an empty area of the chart	Cancels the last rectangle zoom operation.
	Shift + Right click	Cancels all zooms and returns to the initial view.
Middle Button	Hold middle click + draw a rectangle	Precisely zooms into the area defined by the rectangle.
	Hold middle click + draw a line on an axis	Zooms into the selected interval on that axis.
	Hold middle click on the graduation of an axis	Allows very precise zooming, "snapping" from ticks to ticks.
Scroll Wheel	Scroll the wheel	Zooms in or out progressively, centered on the cursor position, as in a mapping software.
	Scroll the wheel on a specific axis (which appears in bold)	The zoom applies only to that axis.
	Shift + Scroll	Zoom in or out using a higher zoom factor.
	Control + Scroll	Zoom in or out ONLY on the X axis.

On Chart Elements (Legend, Axes, Title)

These actions allow you to finely configure the appearance and properties of your chart.

Context	Button	Action	Result
Legend	Left Click	Click on a dataset name	Shows or hides symbols for each point of the curve.
	Right Click	Click on a dataset name	Opens the curve configuration window (style, color, thickness, coloring, "pens" configuration for conditional coloring).
Axes	Right Click	Click on an axis (X or Y)	Opens the axis configuration window (range, graduations, label, color, etc.).
Graph name	Right Click	Click on the chart tab	Allows renaming the chart.

On Markers

Markers are analysis tools that allow you to point to precise values on your curves.

Button	Action	Result
Left Click	Hold left click + move on the marker line (when the background turns blue)	Moves the marker to change the pointed value. The displayed values update dynamically. On a "point" marker, this moves the marker from measurement point to measurement point.
	Hold left click + move on the marker text (when the background turns blue)	Repositions the marker label (text) without changing the pointed value.
	Shift + Hold left click + move on the marker line (when the background turns blue)	Repositions the marker (vertical or horizontal) constraining the position to data values only.
Right Click	Click on a marker	Opens its attribute window to change style, color, value format, etc.