Updated SevenSegDigit object API (markdown)

SevenSegDigit-object-API.md

@@ -1,7 +1,18 @@
 SevenSegDigit represents a color object that is represented by A, B, C, D, E, F, G, decimal, and special component values; which represent the names of the segments of a seven segment display.
 
 ## Properties
-There is one property that represent the component values of the segments.  The values in each location range from 0 to 255.  Black or off would 0 and white or full on would be 255.  The index can be addressed by [LedSegment enum](https://github.com/Makuna/NeoPixelBus/wiki/LedSegment-enum)`.  
+There is one property that represent the component values of the segments.  The values in each location range from 0 to 255.  Black or off would 0 and white or full on would be 255.  The index can be addressed by the [enum LedSegment](## "enum LedSegment {  
+    LedSegment_A,
+    LedSegment_B,
+    LedSegment_C,
+    LedSegment_D,
+    LedSegment_E,
+    LedSegment_F,
+    LedSegment_G,
+    LedSegment_Decimal, // maybe jumpered to alternate custom segment
+    LedSegment_Custom // generally not used but maybe connected to a custom segment
+}").
+ 
 ```
 uint8_t Segment[Count];
 ```
@@ -91,3 +102,6 @@ The index operator allows accessing the segments with an index directly on the o
 ```
    uint8_t decimalBrightness = digit[LedSegment_Decimal];
 ```
+
+## references:
+[enum LedSegment](https://github.com/Makuna/NeoPixelBus/wiki/LedSegment-enum).