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#### A.5.7.1 Plane Axes Control

The Axes control () for the plane plot window has five tabs.

Coords tab of plane axes control

The Coords tab controls the axis coordinates. It has the following options:

X/Y Log
  If selected, horizontal/vertical axis coordinates are logarithmic, otherwise they are linear.
X/Y Flip
  If selected, horizontal/vertical axis coordinate axes run in the opposite direction to normal.
Aspect Lock
  If selected, the number of pixels per unit is always the same on both axes, i.e. the unit square is always a square. Otherwise, there is no constraint on the relative sizes of the X and Y axis units.

Range tab of plane axes control

The Range tab provides manual configuration of the visible range of the plot. Making changes to this tab will reset the visible plot range, but not vice versa - zooming and panning in the usual way will not change the settings of this panel.

Filling in the Minimum/Maximum fields for either or both axes will constrain the corresponding range of the visible data. The limits corresponding to any of those fields that are left blank will initially be worked out from the data. The Subrange double-sliders restrict the ranges within the (explicit or automatic) min/max ranges. Note you can move both sliders at once by grabbing a position between the two.

The Clear button resets all the fields. The Submit button updates the plot with the current values in this tab, as does making any changes to it.

Grid tab of plane axes control

The Grid tab configures appearance of the axis grid.

Draw Grid
  If true, grid lines will be drawn across the plot for every tick mark.
Minor Ticks
  If set, minor (unlabelled) tick marks will be drawn between the major (labelled) ones.
X/Y Tick Crowding
  Use the slider to influence how many tick marks are draw on each axis.

Labels tab of plane axes control

The Labels tab controls the text labels on the axes. If the Auto checkbox is set, the text will be taken from one of the data coordinates being plotted on that axis. To override those with your own axis labels, unset Auto and type text in to the Label fields.

Font tab of plane axes control

The Font tab configures the font used for axis annotation. It also affects some other things like the legend.

Text Syntax
  Whether to use plain text or LaTeX rules to make sense of the text value.
Font Size
  Size of the font in points.
Font Style
  Style of the font.
Font Weight
  Whether the font is plain, bold or italic.

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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