A Value Input block is used to provide input value into a Sub-flow from outside of the block. The Value Input block shows the following properties:
The title of the block “Value Input” can be changed by double-clicking on it and typing in a new title.
Input defines the value that can be input into the sub-flow. So to make it available from outside into the sub-flow, the ‘input’ should be connected to desired property of required block..
Updated January 12th 2018.