I am working with many layers. Each time I open my saved project, I must reload the min/max (properties/style) values. Is there a way to turn off the default 2% cut?
You can try changing it in
Settings > Options | Rendering (tab)
There is a section in the
Rendering tab called
You can change either the
Contrast Enhancement(s) to "Stretch to MinMax"
Limits to "Minimum / maximum" and the
Cumulative pixel count cut limits to 0% and 100% respectively.
If this doesn't work, consider adding a bug report or feature request at https://hub.qgis.org/projects/quantum-gis/issues