Absolutely it's possible - the whole Menu system is designed to be customisable. If you open the Menu Manager in the game window, you'll be able to select and edit each of the Menus, and create your own.
A number of tutorials on Menus can be found here, but what you'll want to do in general terms is to create a new Menu that just stores the toggle button you want to open the Inventory with. You can link a Button to an ActionList asset, that runs when you click it.
Within this ActionList, you can use the Menu: Check state Action to work out if the Inventory Menu is turned off, and turn it on if it is (and vice-versa). Bear in mind that you'll have to change your Inventory Menu's Appear Type to Manual, so that it's state can be changed using Actions.
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Absolutely it's possible - the whole Menu system is designed to be customisable. If you open the Menu Manager in the game window, you'll be able to select and edit each of the Menus, and create your own.
A number of tutorials on Menus can be found here, but what you'll want to do in general terms is to create a new Menu that just stores the toggle button you want to open the Inventory with. You can link a Button to an ActionList asset, that runs when you click it.
Within this ActionList, you can use the Menu: Check state Action to work out if the Inventory Menu is turned off, and turn it on if it is (and vice-versa). Bear in mind that you'll have to change your Inventory Menu's Appear Type to Manual, so that it's state can be changed using Actions.
In fact, this question was asked quite recently, with accompanying screenshots.