Hello, there! :)
(http://orig08.deviantart.net/2028/f/2015/184/0/b/cooltext125406274588380_by_sephalovable-d8zsfph.png)
(http://orig14.deviantart.net/1d8c/f/2015/184/a/5/tscrolltrick_by_sephalovable-d8zshan.png)
(http://orig05.deviantart.net/4f3d/f/2015/184/d/5/cooltext125408304960047_by_sephalovable-d8zsiqo.png)
Okay you see the scroll bar? And the little square you hold down to look for items? While at the very top of the item pack, you will see that the little square box is at the top alongside you. Look to the way way bottom of the scroll bar, just before the scroll bar ends and the rest of the display window begins. If you click once on that little edge just before the scroll bar ends, the little square will slowly go down. It shows 5 items per click, and yes, they are in order and don't skip. It may appear that you're skipping items, but you're not. This is my method for viewing all the items. It doesn't matter how long you hold the button down, it will only scroll once. Hope this helped! This works for Markings and presets, too.
Source: Sephalovable (http://sephalovable.deviantart.com/) on DeviantArt
[FeralHeart] Tips and Tricks (http://sephalovable.deviantart.com/journal/Feral-Heart-Tips-and-Tricks-Part-1-543848213)
I hope this will be helpful for you.