Following the "Configuring and Multiplying Visualization Elements as Templates" in Codesys online help for Codesys 3.5.16.0, it says to use "$FIRSTDIM$" placeholder as the index for the data array in order to be able to "multiply visualizations", but this placeholder doesn't exist at my end. I am using the same version 3.5.16.0 of Codesys. How can this be fixed?