Sets ListviewAlphaSelect = 0 under Explorer\Advanced. Replaces the semi-transparent 'rubber-band' selection box you drag in Explorer/desktop with a plain outline. Another 'best performance' visual effect — removing the per-frame alpha-blend makes rubber-band selection over many icons smoother. Takes effect on the next Explorer refresh. Reversible.
MaxTweaks applies this tweak with one click and snapshots your original setting first, so you can revert it cleanly at any time. A System Restore point is offered before batch changes, and every tweak links to its official source.
Get MaxTweaksOfficial documentation: https://learn.microsoft.com/en-us/windows/win32/shell/