This very simple mod makes Split Item menu slightly less unbearable. It fixes split item menu unresponsive behavior (vanilla buttons delay is ~0.5 sec), adds min/max buttons to instantly choose "1" or "whole stack" and highlights target amount text to make it more clear, that user can change it manually when needed.

Before

After

Installation:
Manually drop pak file from archive to Mods folder (Appdata\Local\Larian Studios\Baldur's Gate 3\Mods) and enable it in in-game mod manager. Or use BG3MM/Vortex.

Uninstallation:
Disable/uninstall mod in in-game mod manager or in BG3MM/Vortex. Don't delete pak manually in Mods folder.
When uninstalling version installed via in-game mod manager from mod.io, unsubscribe on mod.io, otherwise in-game mod manager will try to install it on background again.

Compatibility:
KB/M compatible, controller UI without changes. Made to look great on any aspect ratio.
Should be compatible with any other mod that doesn't edit the same widget.

Better Split Item Menu