expression, ichidan verb
paginate; number the pages
A straightforward expression meaning to assign page numbers to a document or book.
レポートを印刷する前に、ページ番号を付けてください。
Please number the pages before printing the report.
ページ付け is the noun form meaning 'pagination' or 'page numbering', while ページ番号を付ける is the verb phrase 'to paginate'.
Standard kanji-katakana spelling for the expression.
Kana spelling of the verb part; common in everyday writing.
A compound of ページ番号 (page number) + を + 付ける (to attach/assign). The expression is transparent and modern.