Update README.md

Function Generator/README.md

@@ -1,3 +1,5 @@
+# Function Generator on a RP2040. #
+
 ![alt text](https://github.com/oddwires/RP2040/blob/master/Function%20Generator/Images/work-in-progress.gif)****Work In Progress.****
 ![alt text](https://github.com/oddwires/RP2040/blob/master/Function%20Generator/Images/work-in-progress.gif)
 * TBD:
@@ -5,9 +7,8 @@
   * Use the additional GPIO ports to implement a second DMA channel and add code for Lissajou figures.
   * Port the clock code from [here](https://www.micro-examples.com/articles/index.php?title=PicOClock)
 
-# Function Generator on a RP2040. #
-
-* Direct digital synthesis (DDS) Function Generator
+* Features:
+  * Direct digital synthesis (DDS) Function Generator
   * Target device = Pimoroni PGA2040 to maximise GPIO connections
   * Nixie tube display with 170 volt SMPU
   * Digital level control