There are a few reasons why this may be the case.
1. it sometimes depends on the input that you use.
Suppose that you are using HDMI with your W1070 or the HT1075 and you come across some settings that are inaccessible; you can't highlight them or select them at all. This means that these seettings are only available on analog inputs or PC inputs, like component or VGA input, sometimes called computer 1 or Computer 2. For example, the horizontal and vertical picture adjustment is only available through VGA and BASIC color temperature adjustments also are only found on VGA, however other options do unlock, so to speak when you use HDMI that are otherwise unavailable on VGA. One thing to mention is that with HDMI, since it is a digital source, some things are preset to their best settings and cannot be changed. its a feature benefit, really.
2. It also depends on the preset picture mode that you are using
Its right there in the words: preset mode, meaning that certain things are preset to their best settings by as professional calibrator and are left alone so that the picture always stays the way it was meant to be. Most of the time, you don't even need to mess with the settings at all.
3. There is no source at all connected
There needs to be a source connected to the unit to enable most settings for that input, so when there are no inputs, you get basically nothing. Just plug something into the unit, and you will be good to go!