For scroll movement you have the mouse button click on the toolbar arrows, you have the mouse wheel, you have the Alt + up/down and you have page up down.
But you didn't let us utilize all this overlap by letting us configure it permanently. So they are all basically the same thing, and if we want it different we have to manually choose differently every single time.
As in: I should be able to scroll up/down per verse with the mouse wheel or arrow keys. Go up/down per chapter with Alt + up/down and per page with page up/down. I should be able to have this system set up permanently so it behaves that way always. I shouldn't have to manually choose from a drop down menu and then use one of my four input options that are the same thing. Why not just divide the input options so they are their own independent movement scope?
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And is there a way to make Bibles and books have their window go only from the beginning of a chapter to the end of that chapter? Currently you have crammed eighteen hundred pages of the KJV into a single scroll bar. It's so sensitive when moving it that it's entirely pointless to try and use. If instead only the book of Genesis would be the length of the scroll, then I could drag it up and down nicely. Then I would simply use one of my hotkeys, like Ctrl + left/right or something to go to the prev/next chapter. I have no idea why you would put an entire book into a single scroll bar. The software has to load the entire Bible into my RAM too, instead of just one chapter at a time and swapping that same RAM when moving between chapters. I've noticed a slow down when having multiple things on the go and this is probably why.