The **-t** option
^^^^^^^^^^^^^^^^^

**Syntax**

**-t**\ *transp*\ [/*transp2*][**+f**\ \|\ **s**]
    Set transparency level(s) for an overlay.

**Description**

The **-t** option allows you to change the transparency level for the current overlay by appending the *transp*
percentage in the 0-100 range [default is 0 (i.e., opaque)]. Normally, *transp* applies to both fill and stroke, but you
can limit the transparency to one of them by appending **+f** or **+s** for fill or stroke, respectively. Alternatively,
append /*transp2* to set separate transparencies for fills and strokes.


Transparency may also be controlled on a feature by feature basis when setting color or fill (see the cookbook section
:ref:`-Gfill_attrib`). **Notes**: (1) The modules :doc:`/plot`, :doc:`/plot3d`, and :doc:`/text` can all change
transparency on a record-by-record basis if **-t** is given without argument and the input file supplies variable
transparencies as the last numerical column value(s). (2) The transparency is only visible when PDF or raster
format output is selected because the PostScript language does not support transparency. Only the PNG format selection
adds a transparency layer in the image (for further processing).
