diff --git a/src/backend/mod.rs b/src/backend/mod.rs
index a674fdb..75d12a9 100644
--- a/src/backend/mod.rs
+++ b/src/backend/mod.rs
@@ -4,37 +4,44 @@
 //! each with different performance characteristics and trade-offs:
 //!
 //! - [`WebGl2Backend`]: GPU-accelerated rendering powered by [beamterm][beamterm]. Uses prebuilt
-//!   font atlases. Best performance, capable of 60fps on large terminals (300x100+).
+//!   or runtime generated font atlases. Very low overhead, typically under 1ms CPU time per frame,
+//!   even for fullscreen terminals with all cells changing.
 //!
-//! - [`CanvasBackend`]: Canvas 2D API with full Unicode support via browser font rendering.
-//!   Good fallback when WebGL2 isn't available or when dynamic character support is required.
-//!   Does not support hyperlinks or text selection, but can render dynamic Unicode/emoji.
+//! - [`CanvasBackend`]: Canvas 2D API with Unicode support via browser font rendering.
+//!   Good fallback for the `WebGl2Backend`, if WebGL2 isn't available. Does not support hyperlinks
+//!   or text selection, but can render dynamic Unicode and single-cell emoji.
 //!
-//! - [`DomBackend`]: Renders cells as HTML elements. Most compatible and accessible,
-//!   supports hyperlinks, but slowest for large terminals.
+//! - [`DomBackend`]: Renders cells as HTML elements. Most compatible, but slowest for large
+//!   terminals.
 //!
 //! [beamterm]: https://github.com/junkdog/beamterm
 //!
 //! ## Backend Comparison
 //!
-//! | Feature                      | DomBackend | CanvasBackend | WebGl2Backend    |
-//! |------------------------------|------------|---------------|------------------|
-//! | **60fps on large terminals** | ✗          | ✗             | ✓                |
-//! | **Memory Usage**             | Highest    | Medium        | Lowest           |
-//! | **Hyperlinks**               | ✓          | ✗             | ✓                |
-//! | **Text Selection**           | ✓          | ✗             | ✓                |
-//! | **Accessibility**            | ✓          | Limited       | Limited          |
-//! | **Unicode/Emoji Support**    | Full       | Full          | Limited to atlas |
-//! | **Dynamic Characters**       | ✓          | ✓             | ✗                |
-//! | **Font Variants**            | ✓          | Regular only  | ✓                |
-//! | **Underline**                | ✓          | ✗             | ✓                |
-//! | **Strikethrough**            | ✓          | ✗             | ✓                |
-//! | **Browser Support**          | All        | All           | Modern (2017+)   |
+//! | Feature                      | DomBackend | CanvasBackend | WebGl2Backend  |
+//! |------------------------------|------------|---------------|----------------|
+//! | **60fps on large terminals** | ✗          | ✗             | ✓              |
+//! | **Memory Usage**             | Highest    | Medium        | Lowest         |
+//! | **Hyperlinks**               | ✗          | ✗             | ✓              |
+//! | **Text Selection**           | Linear     | ✗             | Linear/Block   |
+//! | **Unicode/Emoji Support**    | Full       | Limited²      | Full¹          |
+//! | **Dynamic Characters**       | ✓          | ✓             | ✓¹             |
+//! | **Font Variants**            | ✓          | Regular only  | ✓              |
+//! | **Underline**                | ✓          | ✗             | ✓              |
+//! | **Strikethrough**            | ✓          | ✗             | ✓              |
+//! | **Browser Support**          | All        | All           | Modern (2017+) |
+//!
+//! ¹: The [dynamic font atlas](webgl2::FontAtlasConfig::Dynamic) rasterizes
+//!    glyphs on demand with full Unicode/emoji and font variant support. The
+//!    [static font atlas](webgl2::FontAtlasConfig::Static) is limited to glyphs
+//!    compiled into the `.atlas` file.
+//! ²: Unicode is supported, but emoji only render correctly when it spans one cell.
+//!    Most emoji occupy two cells.
 //!
 //! ## Choosing a Backend
 //!
 //! - **WebGl2Backend**: Preferred for most applications - consumes the least amount of resources
-//! - **CanvasBackend**: When you need dynamic Unicode/emoji or must support non-WebGL2 browsers
+//! - **CanvasBackend**: When you must support non-WebGL2 browsers
 //! - **DomBackend**: When you need better accessibility or CSS styling
 
 /// Canvas backend.
diff --git a/src/backend/webgl2.rs b/src/backend/webgl2.rs
index 11dec5b..b688cb8 100644
--- a/src/backend/webgl2.rs
+++ b/src/backend/webgl2.rs
@@ -23,7 +23,7 @@ use std::{
 };
 use web_sys::{wasm_bindgen::JsCast, window, Element};
 
-/// Re-export beamterm's atlas data type. Used by [`WebGl2BackendOptions::font_atlas`].
+/// Re-export beamterm's atlas data type. Used by [`FontAtlasConfig::Static`].
 pub use beamterm_renderer::FontAtlasData;
 
 /// Font atlas configuration.
@@ -104,9 +104,9 @@ impl WebGl2BackendOptions {
         self
     }
 
-    /// Sets the fallback glyph to use for characters not in the font atlas.
+    /// Sets the fallback glyph for missing characters.
     ///
-    /// If not set, defaults to a space character (` `).
+    /// Used when a glyph is missing from the font atlas. Defaults to a space character.
     pub fn fallback_glyph(mut self, glyph: &str) -> Self {
         self.fallback_glyph = Some(glyph.into());
         self
@@ -231,12 +231,13 @@ impl WebGl2BackendOptions {
 ///
 /// WebGL2 is supported in all modern browsers (Chrome 56+, Firefox 51+, Safari 15+).
 ///
-/// ## Font Atlas Limitation
+/// ## Font Atlas Options
 ///
-/// [`WebGl2Backend`] uses prebuilt font atlases for performance. Characters not in the atlas
-/// will display as ` `. Use [`CanvasBackend`] if you need dynamic Unicode/emoji support.
+/// [`WebGl2Backend`] supports two font atlas modes via [`FontAtlasConfig`]:
 ///
-/// [`CanvasBackend`]: crate::backend::canvas::CanvasBackend
+/// - **Dynamic**: Rasterizes glyphs on demand with full Unicode/emoji and font variant support.
+/// - **Static** (default): Uses pre-generated `.atlas` files. The default atlas is embedded
+///   in beamterm. Characters not in the atlas display as the fallback glyph (space by default).
 ///
 /// # Performance Measurement
 ///