my_xschem/xschem/symbols/devices/param.sym

v {xschem version=2.9.5_RC5 file_version=1.1}
G {type=spice_parameters
template="name=s1 value=\\"w=10u\\""
format=".param @value"}
V {}
S {}
E {}
L 4 0 -10 90 -10 {}
T {PARAMETER   @value} 5 -25 0 0 0.3 0.3 {}