UImod is a new UI for modifiers that is displayed in overlay of your active viewport in 3ds Max.
You can make a button from the modifierstack of your selection. This will save all the modifiers on this object and all the values of the properties of the modifiers. You can see this in the video where I change some checkboxes and values of modifiers.
Right clicking on the button gives you the properties of the button. You can change the name and folor of the button. More options will be coming soon.