Please create a select all button for pms

Please create a select all button fOr pm list because when some of us have to send out pms through phOnes we have to send each individually and sending 230+ pms individually takes hours to send. Please please create a select all. It'll b easier. For computers and phones especially. Cz though u can send pms by selecting ppl through computer on phone u have to select each person individually to send pms and it takes a lot of time.