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#### A.4.2.2 Table Data Layer Controls

Most, but not all, of the available layer controls are concerned with plotting table data in some way or other. In general, these allow you to set up a way to generate a plot layer (some generated graphics) from some selected columns of a given table with a chosen style.

However, if you have more than one Row Subset for a given table, a single control can be used to generate several layers, one for each subset. In most cases it makes sense to have the graphics generated by the different subsets configured similarly, but still visually distinguishable.

These table layer controls generally have three tabs: Position, Subsets and Form. The Position tab is for specifying coordinates, and depends on the specific type of the plot and the layer control. The Subsets and Form tabs control which row subsets are plotted and how they are displayed, and a description of how they are arranged follows below.

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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