Update HR-C99C-Z-C045.md (Koenkk#1621)

* Update HR-C99C-Z-C045.md

Add some detail on the utility of the center of circular button. Its the ways to access some action

* Update HR-C99C-Z-C045.md

Co-authored-by: Koen Kanters <[email protected]>

Author: seb49

docs/devices/HR-C99C-Z-C045.md

@@ -29,6 +29,13 @@ pageClass: device-page
 ### Pairing
 Hold small reset button pressed (located on the backside of remote) for 3
 seconds (until the front LED blinks) and device will reset and will attempt to join network.
+
+### Actions generated by circular button
+It is important to know that click on the center round boutton is the way to switch between
+`color_saturation_step_down` and `color_temperature_step_up` (bottom of the cicrcular button) 
+`color_saturation_step_up` and  `color_temperature_step_down` (top of the cicrcular button) 
+`color_hue_step_down` and nothing (left of the cicrcular button)
+`color_hue_step_up` and nothing (right of the cicrcular button)
 <!-- Notes END: Do not edit below this line -->