I lack a few elements to imagine a layout

I lack a few elements to imagine a layout:
1 • To make a menu that appears at the top, I used “Animate while scrolling” with opacity from 0 to 100% at the top.
But by grouping to check “Lock at the top of the page”. The opacity effect no longer works.
2 • It is sorely lacking the possibility of changing the borders on mouse over, and why not, as in muse, the possibility of switching from one svg (or image) to another.
3 • Still no “active” state on the buttons, ie a state when donated is on the page or the anchor concerned.

Hi @DesignDealer, thanks all good points. I think #1 actually works with the 3.1 changes to parallax.