The macro "swap for 2 slots" for "Stalcraft" can be downloaded and used on any mouse and keyboard. Installing the macro is very easy in the Keyran program and increases your skill level in the game, if you follow the instructions!
Macro for switching to the second slot:
When the inventory is open, hover over the quick access items (weapons, hill, bandages, etc.) and press the number 2. The macro will automatically switch you to the second slot. Convenient and fast!