You can insert most types of image files into a Visio diagram. They appear as normal pictures but don’t have some features that Visio shapes have, like connection points (though you can still connect them to other shapes using a connector).
On the Insert tab, in the Illustrations group, click Pictures or Online Pictures.
Locate the picture you want to insert, click the picture file, and then click Open (if the picture is on your PC) or Insert (if the picture is online).
Some files that you import into Visio drawings as graphic images appear as metafiles. However, bitmap files, such as .bmp, .jpg, .pcx, and so on, remain bitmaps in the Visio drawing.