diff --git a/DESCRIPTION b/DESCRIPTION
index de79ccd..0f6aa4b 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -65,6 +65,7 @@ Collate:
     'biplot-key.r'
     'biplot.r'
     'coord-rect.r'
+    'coord-scaffold.r'
     'data.r'
     'dplyr-verbs.r'
     'utils.r'
@@ -117,7 +118,7 @@ Collate:
     'stat-rule.r'
     'stat-scale.r'
     'stat-spantree.r'
-    'themes.r'
+    'theme-scaffold.r'
     'zzz-biplot-geoms.r'
     'zzz-biplot-stats.r'
     'zzz.r'
diff --git a/NAMESPACE b/NAMESPACE
index cfc82d7..bff1e2e 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -183,8 +183,8 @@ S3method(screeplot,tbl_ord)
 S3method(stats::model.frame,lda_ord)
 S3method(tidy,tbl_ord)
 export("%>%")
-export(CoordBiplot)
 export(CoordRect)
+export(CoordScaffold)
 export(GeomAxis)
 export(GeomBagplot)
 export(GeomInterpolation)
@@ -248,8 +248,8 @@ export(cbind_cols)
 export(cbind_rows)
 export(cmdscale_ord)
 export(confer_inertia)
-export(coord_biplot)
 export(coord_rect)
+export(coord_scaffold)
 export(coord_square)
 export(draw_key_crosslines)
 export(draw_key_crosspoint)
diff --git a/R/coord-rect.r b/R/coord-rect.r
index 52016b1..a81297e 100644
--- a/R/coord-rect.r
+++ b/R/coord-rect.r
@@ -1,3 +1,33 @@
+#' @title Cartesian coordinates and plotting window with fixed aspect ratios
+#'
+#' @description Geometric data analysis often requires that coordinates lie on
+#'   the same scale. The coordinate system `CoordRect`, alias `CoordSquare`,
+#'   provides control of both coordinate and window aspect ratios.
+#'
+#' @inheritParams ggplot2::coord_fixed
+#' @param window_ratio aspect ratio of plotting window
+#' @example inst/examples/ex-coord-rect.r
+#' @export
+coord_rect <- function(
+    ratio = 1, window_ratio = ratio,
+    xlim = NULL, ylim = NULL, expand = TRUE, clip = "on"
+) {
+  ggplot2:::check_coord_limits(xlim)
+  ggplot2:::check_coord_limits(ylim)
+  ggproto(
+    NULL, CoordRect,
+    limits = list(x = xlim, y = ylim),
+    ratio = ratio, window_ratio = window_ratio,
+    expand = expand,
+    clip = clip
+  )
+}
+
+#' @rdname coord_rect
+#' @usage NULL
+#' @export
+coord_square <- coord_rect
+
 #' @rdname ordr-ggproto
 #' @format NULL
 #' @usage NULL
@@ -26,7 +56,7 @@ CoordRect <- ggproto(
     aesthetic_y <- scale_y$aesthetics[1]
     
     # synchronize limits and ranges according to `window_ratio` after adjusting
-    # for `ratio` (if it is provided; it isn't in `CoordBiplot`)
+    # for `ratio` (if it is provided; it isn't in `CoordScaffold`)
     adj_ratio <- self$window_ratio / (self$ratio %||% 1)
     limits <- reconcile_rectangle(limits_x, limits_y, adj_ratio)
     continuous_range <- reconcile_rectangle(
@@ -53,95 +83,6 @@ CoordRect <- ggproto(
   }
 )
 
-#' @rdname ordr-ggproto
-#' @format NULL
-#' @usage NULL
-#' @export
-CoordBiplot <- ggproto(
-  "CoordBiplot", CoordRect,
-  
-  # require coordinate aspect ratio to be 1
-  aspect = function(self, ranges) {
-    diff(ranges$y.range) / diff(ranges$x.range)
-  }
-)
-
-#' @title Cartesian coordinates and plotting window with fixed aspect ratios
-#'
-#' @description 2- (and 3-) dimensional biplots require that coordinates lie on
-#'   the same scale but may additionally benefit from a square plotting window.
-#'   The general-purpose coordinate system `CoordRect`, alias `CoordSquare`,
-#'   provides control of both coordinate and window aspect ratios, while the
-#'   convenience `CoordBiplot` system fixes the coordinate aspect ratio at `1`
-#'   and gives the user control only of the plotting window.
-#'
-#' @inheritParams ggplot2::coord_fixed
-#' @param window_ratio aspect ratio of plotting window
-#' @examples
-#' # ensures that the resolutions of the axes and the dimensions of the plotting
-#' # window respect the specified aspect ratios
-#'
-#' p <- ggplot(mtcars, aes(mpg, hp/10)) + geom_point()
-#' p + coord_rect(ratio = 1)
-#' p + coord_rect(ratio = 1, window_ratio = 2)
-#' p + coord_rect(ratio = 1, window_ratio = 1/2)
-#' p + coord_rect(ratio = 5)
-#' p + coord_rect(ratio = 1/5)
-#' p + coord_rect(xlim = c(15, 30))
-#' p + coord_rect(ylim = c(15, 30))
-#'
-#' # Resize the plot to see that the specified aspect ratio is maintained
-#' @export
-coord_rect <- function(
-    ratio = 1, window_ratio = ratio,
-    xlim = NULL, ylim = NULL, expand = TRUE, clip = "on"
-) {
-  ggplot2:::check_coord_limits(xlim)
-  ggplot2:::check_coord_limits(ylim)
-  ggproto(
-    NULL, CoordRect,
-    limits = list(x = xlim, y = ylim),
-    ratio = ratio, window_ratio = window_ratio,
-    expand = expand,
-    clip = clip
-  )
-}
-
-#' @rdname coord_rect
-#' @usage NULL
-#' @export
-coord_square <- coord_rect
-
-#' @rdname coord_rect
-#' @examples
-#' p <- ggplot(mtcars, aes(mpg, hp/10)) + geom_point()
-#' p + coord_biplot()
-#' p + coord_biplot(window_ratio = 2)
-#' 
-#' # prevent rescaling in response to `theme()` aspect ratio
-#' p <- ggplot(mtcars, aes(mpg, hp/5)) + geom_point()
-#' p + coord_equal() + theme(aspect.ratio = 1)
-#' p + coord_biplot() + theme(aspect.ratio = 1)
-#' 
-#' # NB: `theme(aspect.ratio = )` overrides `Coord*$aspect`:
-#' p + coord_fixed(ratio = 1) + theme(aspect.ratio = 1)
-#' p + coord_biplot(window_ratio = 2) + theme(aspect.ratio = 1)
-#' @export
-coord_biplot <- function(
-    window_ratio = 1,
-    xlim = NULL, ylim = NULL, expand = TRUE, clip = "on"
-) {
-  ggplot2:::check_coord_limits(xlim)
-  ggplot2:::check_coord_limits(ylim)
-  ggproto(
-    NULL, CoordBiplot,
-    limits = list(x = xlim, y = ylim),
-    window_ratio = window_ratio,
-    expand = expand,
-    clip = clip
-  )
-}
-
 reconcile_rectangle <- function(xlim, ylim, ratio) {
   sides <- c(diff(xlim), diff(ylim))
   # by how much to scale each dimension to achieve desired aspect ratio
diff --git a/R/coord-scaffold.r b/R/coord-scaffold.r
new file mode 100644
index 0000000..af94081
--- /dev/null
+++ b/R/coord-scaffold.r
@@ -0,0 +1,39 @@
+#' @title Convenience coordinate system for scaffolding axes
+#'
+#' @description 2- (and 3-) dimensional biplots require that coordinates lie on
+#'   the same scale but may additionally benefit from a square plotting window.
+#'   While `CoordRect` provides control of coordinate and window aspect ratios,
+#'   the convenience `CoordScaffold` system also fixes the coordinate aspect
+#'   ratio at `1` and gives the user control only of the plotting window.
+#'
+#' @inheritParams ggplot2::coord_fixed
+#' @param window_ratio aspect ratio of plotting window
+#' @example inst/examples/ex-coord-scaffold.r
+#' @export
+coord_scaffold <- function(
+    window_ratio = 1,
+    xlim = NULL, ylim = NULL, expand = TRUE, clip = "on"
+) {
+  ggplot2:::check_coord_limits(xlim)
+  ggplot2:::check_coord_limits(ylim)
+  ggproto(
+    NULL, CoordScaffold,
+    limits = list(x = xlim, y = ylim),
+    window_ratio = window_ratio,
+    expand = expand,
+    clip = clip
+  )
+}
+
+#' @rdname ordr-ggproto
+#' @format NULL
+#' @usage NULL
+#' @export
+CoordScaffold <- ggproto(
+  "CoordScaffold", CoordRect,
+  
+  # require coordinate aspect ratio to be 1
+  aspect = function(self, ranges) {
+    diff(ranges$y.range) / diff(ranges$x.range)
+  }
+)
diff --git a/R/themes.r b/R/theme-scaffold.r
similarity index 100%
rename from R/themes.r
rename to R/theme-scaffold.r
diff --git a/inst/examples/ex-coord-rect.r b/inst/examples/ex-coord-rect.r
new file mode 100644
index 0000000..177cb49
--- /dev/null
+++ b/inst/examples/ex-coord-rect.r
@@ -0,0 +1,10 @@
+# ensures that the resolutions of the axes and the dimensions of the plotting
+# window respect the specified aspect ratios
+p <- ggplot(mtcars, aes(mpg, hp/10)) + geom_point()
+p + coord_rect(ratio = 1)
+p + coord_rect(ratio = 1, window_ratio = 2)
+p + coord_rect(ratio = 1, window_ratio = 1/2)
+p + coord_rect(ratio = 5)
+p + coord_rect(ratio = 1/5)
+p + coord_rect(xlim = c(15, 30))
+p + coord_rect(ylim = c(15, 30))
diff --git a/inst/examples/ex-coord-scaffold.r b/inst/examples/ex-coord-scaffold.r
new file mode 100644
index 0000000..f392329
--- /dev/null
+++ b/inst/examples/ex-coord-scaffold.r
@@ -0,0 +1,13 @@
+# resize the plot to see that the specified aspect ratio is maintained
+p <- ggplot(mtcars, aes(mpg, hp/10)) + geom_point()
+p + coord_scaffold()
+p + coord_scaffold(window_ratio = 2)
+
+# prevent rescaling in response to `theme()` aspect ratio
+p <- ggplot(mtcars, aes(mpg, hp/5)) + geom_point()
+p + coord_equal() + theme(aspect.ratio = 1)
+p + coord_scaffold() + theme(aspect.ratio = 1)
+
+# NB: `theme(aspect.ratio = )` overrides `Coord*$aspect`:
+p + coord_fixed(ratio = 1) + theme(aspect.ratio = 1)
+p + coord_scaffold(window_ratio = 2) + theme(aspect.ratio = 1)
diff --git a/man/coord_rect.Rd b/man/coord_rect.Rd
index 3ff0f88..733a117 100644
--- a/man/coord_rect.Rd
+++ b/man/coord_rect.Rd
@@ -3,7 +3,6 @@
 \name{coord_rect}
 \alias{coord_rect}
 \alias{coord_square}
-\alias{coord_biplot}
 \title{Cartesian coordinates and plotting window with fixed aspect ratios}
 \usage{
 coord_rect(
@@ -14,14 +13,6 @@ coord_rect(
   expand = TRUE,
   clip = "on"
 )
-
-coord_biplot(
-  window_ratio = 1,
-  xlim = NULL,
-  ylim = NULL,
-  expand = TRUE,
-  clip = "on"
-)
 }
 \arguments{
 \item{ratio}{aspect ratio, expressed as \code{y / x}}
@@ -44,17 +35,13 @@ limits, then those data points may show up in places such as the axes, the
 legend, the plot title, or the plot margins.}
 }
 \description{
-2- (and 3-) dimensional biplots require that coordinates lie on
-the same scale but may additionally benefit from a square plotting window.
-The general-purpose coordinate system \code{CoordRect}, alias \code{CoordSquare},
-provides control of both coordinate and window aspect ratios, while the
-convenience \code{CoordBiplot} system fixes the coordinate aspect ratio at \code{1}
-and gives the user control only of the plotting window.
+Geometric data analysis often requires that coordinates lie on
+the same scale. The coordinate system \code{CoordRect}, alias \code{CoordSquare},
+provides control of both coordinate and window aspect ratios.
 }
 \examples{
 # ensures that the resolutions of the axes and the dimensions of the plotting
 # window respect the specified aspect ratios
-
 p <- ggplot(mtcars, aes(mpg, hp/10)) + geom_point()
 p + coord_rect(ratio = 1)
 p + coord_rect(ratio = 1, window_ratio = 2)
@@ -63,18 +50,4 @@ p + coord_rect(ratio = 5)
 p + coord_rect(ratio = 1/5)
 p + coord_rect(xlim = c(15, 30))
 p + coord_rect(ylim = c(15, 30))
-
-# Resize the plot to see that the specified aspect ratio is maintained
-p <- ggplot(mtcars, aes(mpg, hp/10)) + geom_point()
-p + coord_biplot()
-p + coord_biplot(window_ratio = 2)
-
-# prevent rescaling in response to `theme()` aspect ratio
-p <- ggplot(mtcars, aes(mpg, hp/5)) + geom_point()
-p + coord_equal() + theme(aspect.ratio = 1)
-p + coord_biplot() + theme(aspect.ratio = 1)
-
-# NB: `theme(aspect.ratio = )` overrides `Coord*$aspect`:
-p + coord_fixed(ratio = 1) + theme(aspect.ratio = 1)
-p + coord_biplot(window_ratio = 2) + theme(aspect.ratio = 1)
 }
diff --git a/man/coord_scaffold.Rd b/man/coord_scaffold.Rd
new file mode 100644
index 0000000..10bdb92
--- /dev/null
+++ b/man/coord_scaffold.Rd
@@ -0,0 +1,54 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/coord-scaffold.r
+\name{coord_scaffold}
+\alias{coord_scaffold}
+\title{Convenience coordinate system for scaffolding axes}
+\usage{
+coord_scaffold(
+  window_ratio = 1,
+  xlim = NULL,
+  ylim = NULL,
+  expand = TRUE,
+  clip = "on"
+)
+}
+\arguments{
+\item{window_ratio}{aspect ratio of plotting window}
+
+\item{xlim, ylim}{Limits for the x and y axes.}
+
+\item{expand}{If \code{TRUE}, the default, adds a small expansion factor to
+the limits to ensure that data and axes don't overlap. If \code{FALSE},
+limits are taken exactly from the data or \code{xlim}/\code{ylim}.}
+
+\item{clip}{Should drawing be clipped to the extent of the plot panel? A
+setting of \code{"on"} (the default) means yes, and a setting of \code{"off"}
+means no. In most cases, the default of \code{"on"} should not be changed,
+as setting \code{clip = "off"} can cause unexpected results. It allows
+drawing of data points anywhere on the plot, including in the plot margins. If
+limits are set via \code{xlim} and \code{ylim} and some data points fall outside those
+limits, then those data points may show up in places such as the axes, the
+legend, the plot title, or the plot margins.}
+}
+\description{
+2- (and 3-) dimensional biplots require that coordinates lie on
+the same scale but may additionally benefit from a square plotting window.
+While \code{CoordRect} provides control of coordinate and window aspect ratios,
+the convenience \code{CoordScaffold} system also fixes the coordinate aspect
+ratio at \code{1} and gives the user control only of the plotting window.
+}
+\examples{
+# resize the plot to see that the specified aspect ratio is maintained
+p <- ggplot(mtcars, aes(mpg, hp/10)) + geom_point()
+p + coord_scaffold()
+p + coord_scaffold(window_ratio = 2)
+
+# prevent rescaling in response to `theme()` aspect ratio
+p <- ggplot(mtcars, aes(mpg, hp/5)) + geom_point()
+p + coord_equal() + theme(aspect.ratio = 1)
+p + coord_scaffold() + theme(aspect.ratio = 1)
+
+# NB: `theme(aspect.ratio = )` overrides `Coord*$aspect`:
+p + coord_fixed(ratio = 1) + theme(aspect.ratio = 1)
+p + coord_scaffold(window_ratio = 2) + theme(aspect.ratio = 1)
+}
diff --git a/man/ordr-ggproto.Rd b/man/ordr-ggproto.Rd
index 90a0f19..1ba77f3 100644
--- a/man/ordr-ggproto.Rd
+++ b/man/ordr-ggproto.Rd
@@ -1,6 +1,6 @@
 % Generated by roxygen2: do not edit by hand
-% Please edit documentation in R/aaa-.r, R/coord-rect.r, R/geom-axis.r,
-%   R/geom-bagplot.r, R/geom-interpolation.r, R/geom-intervals.r,
+% Please edit documentation in R/aaa-.r, R/coord-rect.r, R/coord-scaffold.r,
+%   R/geom-axis.r, R/geom-bagplot.r, R/geom-interpolation.r, R/geom-intervals.r,
 %   R/geom-isoline.r, R/geom-origin.r, R/geom-rule.r, R/geom-text-radiate.r,
 %   R/geom-vector.r, R/stat-chull.r, R/stat-depth.r, R/stat-bagplot.r,
 %   R/stat-center.r, R/stat-cone.r, R/stat-matrix.r, R/stat-referent.r,
@@ -10,7 +10,7 @@
 \name{ordr-ggproto}
 \alias{ordr-ggproto}
 \alias{CoordRect}
-\alias{CoordBiplot}
+\alias{CoordScaffold}
 \alias{GeomAxis}
 \alias{GeomBagplot}
 \alias{GeomInterpolation}
diff --git a/man/theme_scaffold.Rd b/man/theme_scaffold.Rd
index dfebf57..b4813ce 100644
--- a/man/theme_scaffold.Rd
+++ b/man/theme_scaffold.Rd
@@ -1,5 +1,5 @@
 % Generated by roxygen2: do not edit by hand
-% Please edit documentation in R/themes.r
+% Please edit documentation in R/theme-scaffold.r
 \name{theme_scaffold}
 \alias{theme_scaffold}
 \alias{theme_biplot}