Do you feel like the touch UI button (the button that's always visible in the top right corner) could be improved? N_EnhancedTouchUIButton does just that.
What it does
Fixes menu dimensions when touch UI is disabled.
Provides the following touch UI display modes (this does not affect mobiles, as the touch UI will always be visible):
Always: Touch UI can not be disabled.
User-defined: The default behavior of RPG Maker MZ.
Never: Touch UI can not be enabled.
Adds an option to display the touch UI button at the bottom.
Automatically removes "Touch UI" entry from options window depending on the chosen display mode.
For user-defined display mode: allows disabling touch UI by default, so that player needs to enable it in the options first. Useful when the primary target audience uses desktops.
Automatically updates touch UI button when option is changed in the options window. Players can immediately see the effect of turning touch UI on or off, or moving the button to the bottom.
In short: you're free to use it on any project (commercial or not) or modify it as you wish, as long as you won't remove the license and the copyright from the plugin.