In practice

Three lines that save a second exchange

The extract itself takes a minute. What saves time is the sentence that travels with it.

Say which pages these were

“Pages 4 and 11–13 of the contract dated 3 March” tells the reader how the extract maps onto the document they already have.

Decide about numbering

Leave the extract starting at page one and explain it, or add numbering that matches the original. Both work; silently doing neither does not.

Keep the original where you can find it

Whoever reads the extract may ask for the full file next. The original is untouched by extracting, which is the point of using extract rather than cut.