On reading surah Hud, verse 41, there is a black circle under the raa of "majr".

Question
Assalamu alaikum,  On reading surah Hud, verse 41, there is a black circle under the raa of "majr".  I have heard it pronounced as a kasra - majree.  Please can you explain the meaning of this circle and if it is pronounced as a kasra if found in other parts of the Quran ?
Jazakallahu.

Answer
Wa alaikum assaalam wa rahmatullahi wa barakaatuh
The word  is a special word and the only word in which Hafs reads with imaalah, which is a mix between an alif and a ya' and a mix between the fathah and kasrah.  The little diamond shape under the ra'  is an indication that there is a special rule here. 
Please see the following link for the full details.
http://www.abouttajweed.com/words-hafs-an-aasim-min-tareeq-ash-shatibiyy/special-words-for-hafs-an-aasim-by-the-way-of-ash-shaatibiy.html
Wa iyyaakum. 
Wa assalaaam