cl_crosshair_t <true|false>
If true, hides the top line of the crosshair, leaving only the left, right, and bottom lines in a T-shape.
Examples
cl_crosshair_t true - Top line is hidden, crosshair becomes a T.
cl_crosshair_t false - Normal four-line crosshair (default).
true and false can also be written as 1 and 0.