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Hello SPM Experts, 

I am reading the VBM8 toolbox manual and just wanted to confirm that I understand this. 

Under Modulated Normalized, Non-Linear Only is equivalent to:

1. Affine + Non-linear with "No" overall grand mean scaling and "Proportional" Normalization.
2. Affine + Non-linear with ICV as a nuisance covariate. 

Q1: If so, does that mean that I do not use "Proportional" Normalization when using non-linear only? 
Q2: If so, does that mean I do use "Overall Grand Mean Scaling" when using non-linear only?

I am currently using Non-linear only without ICV as a covariate, without "Overall Grand Mean Scaling," and without "proportional" normalization. Is this recommended?

Cheers!