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If you open the screen containing the ribbon/toolbar, you can use the select button to launch the respective functions of the select options.
The select button can be hidden from the ribbon/toolbar or shown again programatically through the hideItem / showItem CLAPI methods, or disabled/enabled using disableItem / enableItem. Hiding and disabling the select button's options can be done through the hideSubitem / disableSubitem CLAPI methods.
hideSubitem(itemName, subitemName)
showSubitem(itemName, subitemName)
disableSubitem(itemName, subitemName)
enableSubitem(itemName, subitemName)
These 4 methods are case sensitive. ItemName and subitemName are the values added in the “Menu structure code“, when creating the select button and its children.