Editing Tibetan script (section)

====Head letters====
The head ({{bo-textonly|མགོ}} in Tibetan, Wylie: ''mgo'') letter, or superscript, position above a radical is reserved for the consonants {{bo-textonly|ར}} /ra/, {{bo-textonly|ལ}} /la/, and {{bo-textonly|ས}} /sa/.

*When {{bo-textonly|ར}} /ra/, {{bo-textonly|ལ}} /la/, and {{bo-textonly|ས}} /sa/ are in superscript position with {{bo-textonly|ཀ}} /ka/, {{bo-textonly|ཅ}} /t͡ʃa/, {{bo-textonly|ཏ}} /ta/, {{bo-textonly|པ}} /pa/ and {{bo-textonly|ཙ}} /t͡sa/, there are no changes to their sounds in Lhasa Tibetan, for example:
**{{bo-textonly|རྐ}} /ka/, {{bo-textonly|རྟ}} /ta/, {{bo-textonly|རྤ}} /pa/, {{bo-textonly|རྩ}} /t͡sa/
**{{bo-textonly|ལྐ}} /ka/, {{bo-textonly|ལྕ}} /t͡ʃa/, {{bo-textonly|ལྟ}} /ta/, {{bo-textonly|ལྤ}} /pa/, 
**{{bo-textonly|སྐ}} /ka/, {{bo-textonly|སྟ}} /ta/, {{bo-textonly|སྤ}} /pa/, {{bo-textonly|སྩ}} /t͡sa/
*When {{bo-textonly|ར}} /ra/, {{bo-textonly|ལ}} /la/, and {{bo-textonly|ས}} /sa/ are in superscript position with {{bo-textonly|ག}} /kʰa/, {{bo-textonly|ཇ}} /t͡ʃʰa/, {{bo-textonly|ད}} /tʰa/, {{bo-textonly|བ}} /pʰa/ and {{bo-textonly|ཛ}} /t͡sʰa/, they lose their aspiration and become voiced in Lhasa Tibetan, for example:
**{{bo-textonly|རྒ}} /ga/, {{bo-textonly|རྗ}} /d͡ʒa/, {{bo-textonly|རྡ}} /da/, {{bo-textonly|རྦ}} /ba/, {{bo-textonly|རྫ}} /dza/
**{{bo-textonly|ལྒ}} /ga/, {{bo-textonly|ལྗ}} /d͡ʒa/, {{bo-textonly|ལྡ}} /da/, {{bo-textonly|ལྦ}} /ba/, 
**{{bo-textonly|སྒ}} /ga/, {{bo-textonly|སྡ}} /da/, {{bo-textonly|སྦ}} /ba/
*When {{bo-textonly|ར}} /ra/, {{bo-textonly|ལ}} /la/, and {{bo-textonly|ས}} /sa/ are in superscript position with the nasal consonants {{bo-textonly|ང}} /ŋa/, {{bo-textonly|ཉ}} /ɲya/, {{bo-textonly|ན}} /na/ and {{bo-textonly|མ}} /ma/, they receive a high tone in Lhasa Tibetan, for example:
**{{bo-textonly|རྔ}} /ŋa/, {{bo-textonly|རྙ}} /ɲa/, {{bo-textonly|རྣ}} /na/, {{bo-textonly|རྨ}} /ma/
**{{bo-textonly|ལྔ}} /ŋa/
**{{bo-textonly|སྔ}} /ŋa/, {{bo-textonly|སྙ}} /ɲa/, {{bo-textonly|སྣ}} /na/, {{bo-textonly|སྨ}} /ma/
*When {{bo-textonly|ལ}} /la/ is in superscript position with {{bo-textonly|ཧ}} /ha/, it becomes a [[Lateral consonant#Approximants|voiceless alveolar lateral approximant]] in Lhasa Tibetan:
**{{bo-textonly|ལྷ}} /l̥a/,