lighter copy

Author: Fil

docs/marks/tree.md

@@ -32,7 +32,7 @@ function indent() {
 
 # Tree mark
 
-The **tree mark** produces tree diagrams using the [tree transform](../transforms/tree.md). It is a [composite mark](../features/marks.md#marks-marks), consisting of a [link](./link.md) to render links from parent to child, an optional [dot](./dot.md) for nodes, and a [text](./text.md) for node labels—or two if the **textBalanced** option is truthy, drawing leaf node labels to the right and non-leaf node labels to the left of the node. The link mark uses the [treeLink transform](../transforms/tree.md#treelink-options), while the dot and text marks use the [treeNode transform](../transforms/tree.md#treenode-options).
+The **tree mark** produces tree diagrams using the [tree transform](../transforms/tree.md). It is a [composite mark](../features/marks.md#marks-marks), consisting of a [link](./link.md) to render links from parent to child, an optional [dot](./dot.md) for nodes, and one or two [text](./text.md) for node labels. The link mark uses the [treeLink transform](../transforms/tree.md#treelink-options), while the dot and text marks use the [treeNode transform](../transforms/tree.md#treenode-options).
 
 For example, here is a little family tree of Greek gods.
 
@@ -75,7 +75,7 @@ Plot.plot({
 ```
 :::
 
-The **treeLayout** option specifies the layout algorithm. The tree mark uses the Reingold–Tilford “tidy” tree algorithm, [d3.tree](https://github.com/d3/d3-hierarchy/blob/main/README.md#tree), by default. The [cluster](#cluster-data-options) convenience method sets **treeLayout** to [d3.cluster](https://github.com/d3/d3-hierarchy/blob/main/README.md#cluster), aligning the leaf nodes. Both default **textBalanced** to true.
+The **treeLayout** option specifies the layout algorithm. The tree mark uses the Reingold–Tilford “tidy” tree algorithm, [d3.tree](https://github.com/d3/d3-hierarchy/blob/main/README.md#tree), by default. The [cluster](#cluster-data-options) convenience method sets **treeLayout** to [d3.cluster](https://github.com/d3/d3-hierarchy/blob/main/README.md#cluster), aligning the leaf nodes. Both default the **textBalanced** option to true, drawing non-leaf node labels to the left of the node.
 
 :::plot https://observablehq.com/@observablehq/plot-cluster-flare
 ```js
@@ -151,7 +151,7 @@ The following options are supported:
 * **title** - the text and dot title; defaults to *node:path*
 * **text** - the text label; defaults to *node:name*
 * **textStroke** - the text stroke; defaults to *white*
-* **textBalanced** - the node label orientation
+* **textBalanced** - the orientation of non-leaf labels
 * **dx** - the text horizontal offset; defaults to 6 if left-anchored, or -6 if right-anchored
 * **dy** - the text vertical offset; defaults to 0