Softimage Xsi: normals

I have new problems.

I texture my old models and i have some problems.

1. I have problems with normals - some normasl are inverted, but i can select polygon and then invert (because i have cca 40% of all faces inverted) - can i use some tool like in MAYA to invert all bad normasl and normals that are OK stay?

2. Can i set up XSI to display normals in center of polygon? Not on corner..

3. How can i select polygon witch is inver without orbit and then select?.

4. Where can i reduce polygons? I have model with too much polygons and i need to reduce it.

Thanks