I am BRAND new to Autoit......in fact, experiencing install problems....that is a whole different can of worms. But I have several thousand PDF files, I can manually use keyboard and mouse to open each file and "Optimize" it ( Acrobat internal function to compress by 5x+/-) Then save the file with a modified name = original name &"O" I'm hoping to develop an Autoit script to loop through each file in a folder and Optimize it/save it Has anybody done it already?