In the Ayaats there are some symbols like   ع   م   ط   ص  ج  لا  O  etc. Among them we have to stop reciting for م .  We cannot stop at لا . But if لا comes over a circle than we can stop. For rest of the symbols we can do both.

As for exmple we see the recitation of verse no 64 of sura Mayedah 

أَعُوذُ بِاللَّهِ مِنَ الشَّيْطَانِ الرَّجِيمِ  .  بِسْمِ اللَّهِ الرَّحْمَٰنِ الرَّحِيمِ

وَقَالَتِ الْيَهُودُ يَدُ اللَّهِ مَغْلُولَةٌ ^ط  غُلَّتْ أَيْدِيهِمْ وَلُعِنُوا بِمَا قَالُوا ^م  بَلْ يَدَاهُ مَبْسُوطَتَانِ ^لا يُنفِقُ كَيْفَ يَشَاءُ ^ط  وَلَيَزِيدَنَّ كَثِيرًا مِّنْهُم مَّا أُنزِلَ إِلَيْكَ مِن رَّبِّكَ طُغْيَانًا وَكُفْرًا ^ط وَأَلْقَيْنَا بَيْنَهُمُ الْعَدَاوَةَ وَالْبَغْضَاءَ إِلَىٰ يَوْمِ الْقِيَامَةِ ^ط كُلَّمَا أَوْقَدُوا نَارًا لِّلْحَرْبِ أَطْفَأَهَا اللَّهُ ^لا وَيَسْعَوْنَ فِي الْأَرْضِ فَسَادًا ^ط وَاللَّهُ لَا يُحِبُّ الْمُفْسِدِينَ (٦٤)

Besides these there are other symbols and alphabets to know.  As for very primary stage we have not mentioned here.