Green’s Dictionary of Slang

(UK school) to add marginal or interlinear translations to a classical text.

1914		‘Ian Hay’ Lighter Side of School Life 138: He is greatly addicted to a more venial crime known as ‘paving’. The paver prepares his translation in the orthodox manner, but whenever he has occasion to look up a word in a lexicon, he scribbles its meaning in the margin of the text, or, more frequently, just over the word itself.
1940		M. Marples Public School Slang 52: A common word of special meaning is pave, which denotes the practice of writing the English meamng above words in a Greek or Latin text, thereby presumably paling the was to a successful rendering.