Hi, often when I’m in full screen mode I select a bunch of text by double-clicking out of habit. This causes the FSV to select a huge chunk of text and scroll to the bottom of the document. I’d like:
a) An option to have scrolling in FSV controlled exclusively by mousewheel. I don’t particularly like how it centers the text right now.
b) Better support for double-clicking.
Thanks. Great product otherwise.
That’s an intentional feature, not a quirk, and you can disable it if you don’t like it. It’s called Typewriter Scrolling, and is meant to reduce neck strain by keeping the typing line in the middle of the screen instead of the very bottom. Right-click to switch this feature off, in the contextual menu, if it doesn’t appeal. 
Typewriter scrolling can be enabled or disabled per editor (full screen editor is separate from either of the split editors in the main window). In full screen, you can use the keyboard shortcut Ctrl+G, Ctrl+T to toggle the feature on or off. In the main editors, it’s also available via the Format > Options > Typewriter Scrolling menu.
You may also want to go into Tools > Options and deselect “Fullscreen typewriter scrolling in new projects”, so that TW scrolling is off by default in any new projects you create.
That said, normally typewriter scrolling won’t affect scrolling. There is a bug though on Windows when using this mode with Scrivenings–viewing multiple documents’ text in the editor–which causes the text to jump quickly when you’re making a selection. If you like the text centring otherwise, you could try just working with a single document at a time rather than a Scrivenings session as a way of avoiding the bug.