The digital output level is set in dBFS, this means that 0 dBFS is maximum.
The level is set differently for each WinMLS output signal. Here sine sweep is set to -10 dBFS as shown below.
But if we change to MLS as output signal, the level is set to -13 as shown below.
Note: When using MLS, do not use a higher output level than -13 dBFS. A higher output level will probably cause distortion.