-pc option is added in Worksheet and Set commonds.

//to make plot woksheet -pc plottype template startIndex Increment;
//to modify, %C will need to automatically find group head set %C -pc startIndex Increment
If Increment is a negative number e.g. -N, it means span and plot N plots.

Examples:

Highlight all columns and run
1. worksheet -pc 200 line 2 3 //start from col B, every 3rd col is plotted so i got B, E, H, K, .... in graph.
2. worksheet -pc 200 line 2 -10 //start from column B, span the whole data and pick 10 columns to plot. I got B, O, AB, AO, BB, BO, CB, CO, DB, DO columns plotted.

First plot all data. With graph window active, run
1. set %c -pc 2 3; //start from column B, every 3rd col is plotted.
2. set %c -pc 2 -10; //start from column B, span the whole data and pick 10 columns to plot. I got B, O, AB, AO, BB, BO, CB, CO, DB, DO columns plotted.