5.33.18.4 Entering Arguments on Separate Lines
To enter an argument on a separate line, you must enter a backslash (\) character at the end of the preceding line of the command as shown in the following example:
backannotate -dir \
{..\design} -name "fanouttest_ba.sdf" -format "SDF" -language "VERILOG" \
-netlist
