In Illustrator and InDesign I am able to hide objects in the doc. In Illustrator when I "unhide" all of those objects they show up and are then selected. In InDesign when I "unhide" they merely show up, but are not selected. I don't know if I'm unique in the way I use this feature, but it is very handy to "hide" everything I want to select and then "unhide" to then have the selection. It is useful because with objects that overlap, it can be very cumbersome to find a way to select a bunch of things