aesthetics 
The names of the aesthetics that this scale works with.

scale_name 
The name of the scale
that should be used for error messages associated with this scale.

palette 
A palette function that when called with a numeric vector with
values between 0 and 1 returns the corresponding output values
(e.g., scales::pal_area() ).

name 
The name of the scale. Used as the axis or legend title. If
waiver() , the default, the name of the scale is taken from the first
mapping used for that aesthetic. If NULL , the legend title will be
omitted.

breaks 
One of:

NULL for no breaks

waiver() for the default breaks computed by the
transformation object
A numeric vector of positions
A function that takes the limits as input and returns breaks
as output (e.g., a function returned by scales::extended_breaks() ).
Note that for position scales, limits are provided after scale expansion.
Also accepts rlang lambda function notation.

minor_breaks 
One of:

NULL for no minor breaks

waiver() for the default breaks (one minor break between
each major break)
A numeric vector of positions
A function that given the limits returns a vector of minor breaks. Also
accepts rlang lambda function notation. When
the function has two arguments, it will be given the limits and major
breaks.

n.breaks 
An integer guiding the number of major breaks. The algorithm
may choose a slightly different number to ensure nice break labels. Will
only have an effect if breaks = waiver() . Use NULL to use the default
number of breaks given by the transformation.

labels 
One of:

NULL for no labels

waiver() for the default labels computed by the
transformation object
A character vector giving labels (must be same length as breaks )
An expression vector (must be the same length as breaks). See ?plotmath for details.
A function that takes the breaks as input and returns labels
as output. Also accepts rlang lambda function
notation.

limits 
One of:

NULL to use the default scale range
A numeric vector of length two providing limits of the scale.
Use NA to refer to the existing minimum or maximum
A function that accepts the existing (automatic) limits and returns
new limits. Also accepts rlang lambda function
notation.
Note that setting limits on positional scales will remove data outside of the limits.
If the purpose is to zoom, use the limit argument in the coordinate system
(see coord_cartesian() ).

rescaler 
A function used to scale the input values to the
range [0, 1]. This is always scales::rescale() , except for
diverging and n colour gradients (i.e., scale_colour_gradient2() ,
scale_colour_gradientn() ). The rescaler is ignored by position
scales, which always use scales::rescale() . Also accepts rlang
lambda function notation.

oob 
One of:
Function that handles limits outside of the scale limits
(out of bounds). Also accepts rlang lambda
function notation.
The default (scales::censor() ) replaces out of
bounds values with NA .

scales::squish() for squishing out of bounds values into range.

scales::squish_infinite() for squishing infinite values into range.

expand 
For position scales, a vector of range expansion constants used to add some
padding around the data to ensure that they are placed some distance
away from the axes. Use the convenience function expansion()
to generate the values for the expand argument. The defaults are to
expand the scale by 5% on each side for continuous variables, and by
0.6 units on each side for discrete variables.

na.value 
Missing values will be replaced with this value.

transform 
For continuous scales, the name of a transformation object
or the object itself. Builtin transformations include "asn", "atanh",
"boxcox", "date", "exp", "hms", "identity", "log", "log10", "log1p", "log2",
"logit", "modulus", "probability", "probit", "pseudo_log", "reciprocal",
"reverse", "sqrt" and "time".
A transformation object bundles together a transform, its inverse,
and methods for generating breaks and labels. Transformation objects
are defined in the scales package, and are called transform_<name> . If
transformations require arguments, you can call them from the scales
package, e.g. scales::transform_boxcox(p = 2) .
You can create your own transformation with scales::new_transform() .

trans 
Deprecated in favour of
transform .

guide 
A function used to create a guide or its name. See
guides() for more information.

position 
For position scales, The position of the axis.
left or right for y axes, top or bottom for x axes.

call 
The call used to construct the scale for reporting messages.

super 
The super class to use for the constructed scale
