update README.md

README.md

@@ -18,6 +18,7 @@ A simple, customizable knob widget for egui.
 - Configurable sweep range
 - Background arc with filled segments
 - Adjustable drag sensitivity
+- Logarithmic scaling
 
 ## Installation
 
@@ -104,6 +105,13 @@ Knob::new(&mut value, 0.0, 1.0, KnobStyle::Wiper)
     .with_label_format(|v| format!("{:.0}%", v * 100.0));
 ```
 
+#### Logarithmic Knobs
+```rust
+// Display as percentage
+Knob::new(&mut value, 0.0, 1.0, KnobStyle::Wiper)
+    .with_logarithmic_scaling(true);
+```
+
 ## Running demo app
 
 ```bash