The only options I am aware of on the 788, 798, 958 and 998 units that I have owned are;
1) The ability to select some of the data that displays to left side of the units (time, temp , gps pos, etc.) The depth always displays. On the 11xx series units the readouts on are the bottom, not the left side.
2) On the 998 in SI only view you can turn the white boxes that surround the readouts info on/off.
3) On all units you can turn options like depth lines, SI lines, etc. on/off
4) You can change the size of the .xx units in the readouts.
I do not know of any version of software that allows for moving the readouts side to bottom or wherever.
2013 Lund Rebel 1650 XL Sport
60 hp Mercury 4-stroke
Humminbird 998c HD SI, 958c HD & 788ci HD
Minn Kota Terrova w/i-pilot