Power point怎樣列印(用盡張紙)??

File > Print > select your printer > properties > in the printer option...
in the "Finishing" Tag , go to option " pages per sheet"
and insert the number 4.

the location maybe not actual same since we are not using the same printer , and not the same printer driver.
But you may easy to find this, this is very common option.
Pls try, .... hopes this help.

檔案 -- 列印 -- 列印項目 (講義) -- 每頁投影片張數 (自訂)