9.2.2 The (Plot Details) Size/Speed Tab

The Size/Speed tab appears at the Layer level in the Plot Details dialog box.

Size.png

Layer Area, Units and other controls

To precisely position or resize the layer, type values in the Left, Top, Width, and Height text boxes. The Left text box value determines the position of the frame relative to the left side of the page. The Top text box value determines the position of the frame relative to the top of the page. The Height and Width text box values determine the size of the frame. These values are in units determined by the Units drop-down list.

The Units drop-down list offers both absolute and relative units.

inch, cm, mm, pixel, point

Absolute Units for Left, Top, Width, and Height.

 % of Page

This option is useful for maintaining the same layer size relative to the page size. When this unit is selected, the Left, Top, Height, and Width text box values are in percentage of the graph page height and width.

 % of Linked Layer

This option is available if a layer is a linked child of another layer. This allows you to specify the layer area in percent of the parent layer. When you resize or move the parent layer, the child layer will follow.

Note:

  • When the unit selection is changed in the drop-down list, Left, Top, Height, and Width text box values are automatically updated so that the layer retains the same size and position.
  • When you set the size of the layer, you are also setting the size of the axes in the layer. To set the layer (and thus the axes) to a specific width and height, select the units (For example, inch, cm, or mm) from the Units drop-down list in the Layer Area group, then enter the dimensions in the Width and Height text boxes.

The Link Axis Length to Scale with X:Y Ratio check box is only available for 2D graphs with Cartesian coordinates. It is used to set the length ratio of X and Y axes (the Width and Height of the layer frame) to maintain the aspect ratio of the actual X and Y scales when the layer size is changed. Once this check box is checked, you can enter the ratio value in the edit box. Note that when there is an axis break on one of the axes, this check box will be hidden. For 3D graphs, this control is on the Axis tab of the Plot Details dialog box.

The When dragged to reposition, also reposition parent layer check box is only available when the Units drop-down list is set to % of Linked Layer for a linked child layer. When this box is checked, moving and resizing the linked child layer will cause the parent layer and its other child layers to follow.

Layer Area Control Specific for Linked Layer of Piper Diagram

For the linked layers of Piper Diagram, the Layer Area section in this tab is reorganized. The following screenshot shows the dialog design for Layer 2 of the piper diagram. The Layer 3 dialog looks similar but the Left text box is disabled.

Layer Area Section in Piper.png

On the Size/Speed tab for Layer 2, the value in the Left text box controls the gap between each layer. The value can be any double value, and it corresponds to the percentage of the length between the top vertex of Layer 1 and that of Layer 2 with respect to the side length of rhomb. (see the preview graph in the dialog box).

Graphic Image Caching

Graphic Image Caching can be used whenever a 2D or 3D graph layer needs to be redrawn without being refreshed. For example, when a graph window is overlaid by a another window and then brought to the front again, or when the graph window is resized. For 2D graph layers, select Raster to use caching. For 3D graph layers, select Raster or Vector.

None

Origin redraws the graph layer every time the graph window is moved, brought to the front, or resized.

Raster (bitmap)

Raster buffering tells Origin how many pixels of what color to draw at what position. This information is based on a certain resolution and will become distorted when resized.

Vector (metafile)

Vector buffering provides Origin with a detailed description of how to draw the graph and is fully scalable.

Note: If you resize your graph in raster caching mode, the graph may get a rough pixel appearance. If this occurs, select Window: Refresh from the Origin menu to restore the display.

Speed Mode, Skip Points if Needed

In addition to graphic image caching, you can use Origin's Speed Mode to increase the redraw speed of your graph layer. With speed mode, you can control the number of data points displayed in a graph layer. This option is most useful when working with large data sets, where a reduction in the number of plotted points either speeds screen redraws or reduces clutter in the plot.

When Speed Mode is enabled, the layer icon displays in red and a Speed Mode is On watermark appears in the layer. The watermark is not included when printing, copying, or exporting the graph.

For plots created from worksheet data:

  1. Select the Worksheet Data, Maximum Points Per Curve check box to enable speed mode for all the data plots in the layer that are created from worksheet data.
  2. Type the desired value (n) in the associated text box. If the number of data points in a data plot exceeds n, Origin displays a subset of the data plot that contains n points. This subset contains evenly spaced data - by the worksheet rows.

For 3D plots created from matrix data:

  1. Select the Matrix Data, Maximum Points Per Dimension check box to enable speed mode.
  2. Type the desired value (n, m) in the X and Y text boxes. If the number of data points in a data plot exceeds n or m, Origin displays a subset of the data plot composed of, at maximum, n by m points. This subset contains evenly spaced data - by the matrix columns (X) and matrix rows (Y).

Note:

  • Speed Mode settings are saved with the graph template. If you wish to make Speed Mode settings permanent, you must resave the graph template once changes are made.
  • If you are producing graphs for printing or graphic export, see Available Page Viewing Modes Speed vs Accuracy in the Origin Help file.