What does 4" mean and how did I get it into that mode?
These are full seconds, in contrast to 125, 250, etc, which are fractions of a second (1/125, 1/250, etc.)
2) I purchased a remote shutter control but I can't figure out how to make it work. I assume that I have to turn on some setting but haven't been able to find the setting. Any idea?
You don't have to change anything in order for it to work. Possibilities are:
- Cable not inserted all the way;
- Shutter release not correct model;
- Shutter release simply defective.
3) I'd like to give HDR photography a try but I don't find any way to control bracketing for HDR.
There is a bracketing, but it's in a deep menu dive. Read your manual, it has an index at the end, seek for Bracketing and read the corresponding page in the manual on how to enable it.