TIP: increasing water level in Samsung 520
Since there is no option in the controls for adding water, I found a SIMPLE method to add water to a wash:
1. Start a cycle and wait until all water has been added to the WASH cycle.
2. Hit the PAUSE button and open the door after the lock disengages.
3. Close the door, and in a few seconds you will hear/see more water being added.
4. Repeat 2 and 3 several times (I've found 4-5 works well) to give you the level of water you desire.
The whole process takes just a couple of minutes to add a quart or more of additional water. I've found that sometimes, a small load has plenty of excess water (especially the Stain Away cycle), and other times a small load has not a drop of extra water in it. Large loads generally don't have much (if any) excess water, if the load contains lots of towels).