# XTR.LEFTPANECOLS

> [HTML Version](xtr_leftpanecols.htm)

This specifies the number of columns to be in the left pane. Note that this counts physical columns that have a non-zero data width, whether or not the column is hidden, and it is based on the order in which they are defined in the _coldef_ parameter and not necessarily the order they appear in the physical input data. So columns which use _[cpos](cposcwidth.htm.md)_ and _[cwidth](cposcwidth.htm.md)_ of zero do not count, but all other columns do—including the special column needed for multi-level support, hidden color columns, etc.