blurred images once saved as jpeg or png

[hades8840]

I am using powerpoint 2007 and 365 to try make guides for a game I play ..i can do what i want in power point but when i save the file and reopen it in a picture viewer when the item is zoomed in the images are very blurry.. I have gone into settings telling it not to compress the images makes no difference ....I am using high resolution images to start with so can not work out why it will not just save like that



some help as i have tried reading up and apart from changing the compression options doesnt seem to be anything else i can do