I like that in the application (OS X) I can tab between fields on the servings table where we enter items of food and drink. Sometimes I want to see the sum total bar-charts again, not the chart for a highlighted food item. It means I have to click on some part of the screen to do a simple "deselect all". Would be better to have a Key assigned ie. Esc or some combination of modifiers and letter key or option-tab or anything. I use a stylus and wacom so it's irritating to continual have to leave keyboard when a simple keystroke would suffice.
Also when tabbing through the Measure field how does one pull down the menu just with keystrokes. I though I got a double arrow icon to appear in the right side of field once but got no further and couldn't even repeat that operation using randomised trials :-)
These options would help people with poor motor control etc etc too.