This is one of those ugly, "not officially supported" things:

set gaHistogramData(threshMode) linear-opaque set gaLinedVars(fopaqueflag) 1 SendLinkedVarGroup overlay

On Tue, Jun 26, 2007 at 11:27:39AM -0400, Robert Levy wrote:

Hello,

Does anyone know if it is possible to set the overlay threshold to "linear opaque" mode in tksurfer using TCL commands? I looked at the documentation, and I didn't see a method explicitly for that purpose, but maybe there is some way to specify that option.

Thanks, Rob