diff --git a/src/renderer/CharAtlas.ts b/src/renderer/CharAtlas.ts
index e25628730..b4264567a 100644
--- a/src/renderer/CharAtlas.ts
+++ b/src/renderer/CharAtlas.ts
@@ -20,6 +20,12 @@ interface ICharAtlasCacheEntry {
 
 let charAtlasCache: ICharAtlasCacheEntry[] = [];
 
+/**
+ * Acquires a char atlas, either generating a new one or returning an existing
+ * one that is in use by another terminal.
+ * @param terminal The terminal.
+ * @param colors The colors to use.
+ */
 export function acquireCharAtlas(terminal: ITerminal, colors: IColorSet): HTMLCanvasElement | Promise<ImageBitmap> {
   const scaledCharWidth = terminal.charMeasure.width * window.devicePixelRatio;
   const scaledCharHeight = terminal.charMeasure.height * window.devicePixelRatio;
@@ -95,6 +101,10 @@ function configEquals(a: ICharAtlasConfig, b: ICharAtlasConfig): boolean {
 
 let generator: CharAtlasGenerator;
 
+/**
+ * Initializes the char atlas generator.
+ * @param document The document.
+ */
 export function initialize(document: Document): void {
   if (!generator) {
     generator = new CharAtlasGenerator(document);
diff --git a/src/renderer/ColorManager.ts b/src/renderer/ColorManager.ts
index 2ae785dde..057292f77 100644
--- a/src/renderer/ColorManager.ts
+++ b/src/renderer/ColorManager.ts
@@ -26,6 +26,10 @@ export const DEFAULT_ANSI_COLORS = [
   '#eeeeec'
 ];
 
+/**
+ * Fills an existing 16 length string with the remaining 240 ANSI colors.
+ * @param first16Colors The first 16 ANSI colors.
+ */
 function generate256Colors(first16Colors: string[]): string[] {
   let colors = first16Colors.slice();
 
@@ -52,6 +56,9 @@ function toPaddedHex(c: number): string {
   return s.length < 2 ? '0' + s : s;
 }
 
+/**
+ * Manages the source of truth for a terminal's colors.
+ */
 export class ColorManager {
   public colors: IColorSet;