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### A.4.1 Common Features

The various types of graphics windows have different characteristics to fulfil their different functions, but they share a common way of doing things. Each window contains a number of controls including toolbar buttons, menu items, column selectors and others. In general any change that you make to any of the controls will cause the plot to be redrawn to take account of that change. If this requires a read or re-read of the data, a progress bar at the bottom of the window may show this progressing - except for very large tables it is usually pretty fast.

Each of the graphics windows is displayed by clicking its toolbar button in the Control Window. If one of the tables in the list is selected at the time (the Current Table) the new plot window will initially be displayed showing data from some of its columns (generally the first few numeric columns) by way of illustration. You will usually want to change the controls so it displays the quantities you are interested in.

The following subsections describe some of the features which work the same for most or all of the graphics windows.

- A.4.1.1 Dataset Selectors
- A.4.1.2 Axis Configuration and Zooming
- A.4.1.3 Error Bars
- A.4.1.4 Point Labels
- A.4.1.5 Auxiliary Axes
- A.4.1.6 Defining Subsets by Region
- A.4.1.7 Exporting Graphics

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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@bristol.ac.uk