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### A.4.6 Shading Modes

Most of the Plot Forms have a style colour associated with them for each data set. This defines the basic colour used to plot the shape at each data point. However, many of the forms also ask you to select a Shading Mode, which determines the actual colour displayed in the plot for the plotted points. The shaded colour is based on the selected style colour, but may also be influenced by the number of points plotted there, some extra data coordinate, or other configuration information.

When exporting plots to an external vector graphics format (PDF, SVG or EPS), some of the shading modes may not behave the same as in a bitmap (on the screen, or to a bitmapped format such as GIF or PNG). Any such anomalies are noted in the in the mode descriptions below.

The different mode shading mode options are described in the following subsections.

- A.4.6.1 Flat Mode
- A.4.6.2 Translucent Mode
- A.4.6.3 Transparent Mode
- A.4.6.4 Auto Mode
- A.4.6.5 Density Mode
- A.4.6.6 Aux Mode
- A.4.6.7 Weighted Mode
- A.4.6.8 PAux Mode
- A.4.6.9 PWeighted Mode

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TOPCAT - Tool for OPerations on Catalogues And Tables
Starlink User Note253
TOPCAT web page: http://www.starlink.ac.uk/topcat/
Author email: m.b.taylor@bristol.ac.uk
Mailing list: topcat-user@jiscmail.ac.uk