diff --git a/docs/SupportedBoards.rst b/docs/SupportedBoards.rst
index c063e963a..f58549b3b 100644
--- a/docs/SupportedBoards.rst
+++ b/docs/SupportedBoards.rst
@@ -620,13 +620,15 @@ Muse S BLED
 ~~~~~~~~~~~~~~
 
 .. image:: https://live.staticflickr.com/65535/51249005962_026502fee0.jpg
-    :width: 500px
-    :height: 500px
+    :width: 350px
+    :height: 350px
 
 `Muse Website <https://choosemuse.com/>`_
 
 To use this board you need to get `BLED112 dongle <https://www.silabs.com/wireless/bluetooth/bluegiga-low-energy-legacy-modules/device.bled112>`_.
 
+**Also, on Unix-like systems you may need to configure permissions for serial port or run with sudo.**
+
 To choose this board in BoardShim constructor please specify:
 
 - board_id: 21
@@ -651,13 +653,15 @@ Muse 2 BLED
 ~~~~~~~~~~~~~~
 
 .. image:: https://live.staticflickr.com/65535/51250482419_32ce8454dd.jpg
-    :width: 500px
-    :height: 500px
+    :width: 350px
+    :height: 350px
 
 `Muse Website <https://choosemuse.com/>`_
 
 To use this board you need to get `BLED112 dongle <https://www.silabs.com/wireless/bluetooth/bluegiga-low-energy-legacy-modules/device.bled112>`_.
 
+**Also, on Unix-like systems you may need to configure permissions for serial port or run with sudo.**
+
 To choose this board in BoardShim constructor please specify:
 
 - board_id: 22