You can not have DP832A with 7 segments font, but you can unlock the high resolution option (or any other, or all options) for the DP832, without turning the instrument into a DP832A. Unlocking the options is different from the method used here. Search for "Riglol" to find the key generator.
As a side note, the 7 segments font is very hard to read when compared with the fonts of DP832A. I used to think those 7 segments digits were cool, but the DP832A normal font is so much easier to read that I wouldn't want to go back to seven segments font, ever!