if you follow the High Performance HMI concepts, there is a need for a very clean view of a trend embedded in tanks and sometimes on other objects. Turning off all of the extra trend inputs and outputs is not that easy.

First, in the dialog box with the tabs for defining the source of the curve, turn off all of the visible things. Check each tab for visual items to turn off.

Then, on the chart object, put this script on the initialization event:

main()
{
  this.timeScaleVisibility(0, FALSE, 0);
  this.areaInteractionFlags(0, "NoInteraction");
  this.maxRulerCount(0, 0);
}

Just a box with a trend curve!