Thanks for the friendly response. As I’m sliding the keyframes, in the lower-left corner of the dope sheet pane, a label appears, telling me by how much I’ve moved them. There are two numbers, one which appears to always align with an integer, while the number in parentheses changes by fractions. I can post a screen shot of this, but I would guess anyone could see it in their own copy of Blender. I’m running 2.64
I’d like to know what each of those numbers represents, and whether I can tell Blender the exact DeltaX by which I’d like to adjust.
I’d read the manual, but as far as I can tell, the pages that might be applicable are all "Void page"s.
If I change auto-snap from “Nearest Frame” to “Timestep”, the number in parentheses is no longer displayed. I’d really prefer to understand my tools, rather than guessing at things, but am having trouble finding quality documentation for much of Blender.