"Context-clicking" is the generic, non-platform-specific term used to describe how to get a contextual menu to pop up on a node. On Windows this is commonly called right-clicking. On the Mac it can be accomplished by control-click. I am not sure what Linux uses.
After you have run the VI the color box control is no longer visible. From the block diagram context-click on the terminal. In the menu which pops up choose "Show Control" which will be about 1/3 down the menu. This will bring the front panel forward with the color box control positon (probably behind the chart) shown by dashed lines. If you cannot move it by clicking on it with the arrow cursor, then use the keyboard arrow keys to slide it out from behind the chart. Once is is exposed on the front panel, context click on the control and choose "Allow Transparent" from the pop-up menu (near the bottom of the list). Then the next time you run the VI the "T" box in the upper right corner of the color picker box should be available.
The Pop-Up_Color_Dialog.vi was written to be a simple demonstration of how to get access to the color picker. If you want to make is usable as a subVI, you need to associate the indicators or controls on the front panel with terminals on the connector pane. You do that by clicking on the conpane with the wiring tool cursor and then clicking on the control/indicator you want connected to that terminal. You will also need to find a way to stop that subVI. As long-time Forum particpant Ed Pickens has said, "Using the Abort button to stop a running VI is like using a tree to stop a car. It works but may have undesired consequences." I am not sure how you want to use that subVI (or whether you even really want a subVI), so I cannot tell you what changes to make.
That subVI has a chart but it appears that you probably want a graph. You might be better learning how the subVI works and applying the process to the graphs you already have.
Lynn
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