Using Graphing's Zoom Function

Using the Zoom function can be useful when you wish to take a closer look at a particular region on a graph.

In this Topic:

• Using Your Mouse to Zoom-in on a Graph
• Using the Zoom Window
• Zoom for Scatter Plot Graphs
• Resetting Zoom

Using Your Mouse to Zoom-in on a Graph

Note: This function is only available for Time Series Graphs.

You can conveniently use the zoom function right from a graph. This is useful for quickly expanding a region; or for selecting a specific datapoint from which you want the zoom margin to begin.

To zoom in on a Time Series graph using your mouse:

1. With your graph open, hover your pointer over the graph to reveal a tooltip that shows date and time. Locate the point at which you want the zoom margin to start.
   

2. Highlight the region you want to zoom. Left click and hold, then drag your pointer across the graph.
   

3. Release left click - this is where your zoom margin will end. The graph will refresh, now appearing zoomed in.
   

Using the Zoom Window

Note: This function is only available for Time Series Graphs.

The Zoom Window can be found just below your graph. It has two ‘sliders’ to adjust the zoom margin – the left one changes the start point; and the right slider adjusts the zoom margin’s end point. When a new graph is generated, these sliders first appear on polar opposite sides of the Zoom Window, as demonstrated in the following image:

Adjusting a graph’s zoom is achieved by narrowing the time distance between start date and end date - in other words, creating a 'zoom margin'.

Note: The shorter the distance between Start Date and End Date, the more ‘zoomed-in’ your graph will appear.

Enclosed in the Zoom Window is a pictorial copy of the bottom-most graph’s trend line. If you selected just one channel for graphing, the Zoom Window will reflect that single graph. If more than one channel has been graphed, the bottom-most graph will be reflected in the Zoom Window.

For example: you plotted two channels – temperature and wind speed. With wind speed being the second variable to appear on the graph (the bottom-most) the Zoom Window will contain a copy of the wind speed graph.

The purpose of this feature is to allow you to know where zoom is being applied relative to the entire graph.

To adjust a graph’s zoom using the Zoom Window:

1. Adjust the position of the left slider to change Start Date. Click and hold the left zoom slider, then drag it to the right of the Zoom Window until you have reached a desired starting point, and release. The graph will reload with Start Date updated.
   

2. Adjust the position of the right slider to change End Date. Click and hold the right zoom slider, then drag it to the left of the Zoom Window until you have reached a desired end point, and release. The graph will reload with End Date updated; the graph will refresh, appearing more 'zoomed-in'.
   

Now, the zoom margin will appear white within, while the rest of the Zoom Window will appear gray.

Tip: You can click and drag the zoom margin to move it across the Zoom Window.

Zoom for Scatter Plot Graphs

Note: This section pertains to Scatter Plot graphs only.

Zooming-in on a Scatter Plot can be easily done right from the graph:

1. With your Scatter Plot graph open, click, hold and drag your mouse over the graph, where you want the zoom to be applied.
2. Release your mouse. The graph will refresh with zoom applied.

Resetting Zoom

There are two simple ways to reset zoom settings:

The first method:

With your graph open and zoomed-in, click Reset Zoom from the Graphing Toolbar. The Graphing page will refresh with your zoom margins removed.

The second method:

1. With your graph open and zoomed-in, right-click anywhere on the graph. A menu will appear.
2. Select Reset Zoom; the graphing page will refresh with your zoom settings removed.