Would be good to add a Go To Line Number feature. When the user clicks Command+G (or Control+G ?) a dialog pops up with a text box to enter a line number into. Pressing the Enter key or button would then put the cursor at the beginning of the requested line. Or rather than pop up a dialog window it might be better to turn the line number in the window in the upper right corner (where the Line and Column number are) into a small text box to enter the line number to go to. Tapping on the line number in the upper right corner window would also bring up this feature.
Customer support service by UserEcho