When do Scottish students pay back student loan and how much interest do they pay?

[ssd]

Both for undergraduate and postgraduate loans?

Ive looked online at saas and my mind is a blank

And whats the full amount a student can borrow for the year?

Sorry to be dim i should know this

https://www.saas.gov.uk/full-time/funding-information-undergraduate/funding

Shows how much for under grad. And link on page shows when you repay

https://www.saas.gov.uk/full-time/postgraduate-funding-information/postgraduate-funding

Post grad info

Thank you