Home screen variables

[Nickruberg]

Hi,
I have upgraded from the 50G to the prime and there are a couple of issues I am disappointed with:
With the 50G you could add variables to the home screen, so save a number under a variable and with one keystroke you could call it up. Prime requires a few more buttons.

Another one is that I could add a small routine such as <<25.4 * >> and save this under a variable (INCH) and I could enter a number and press one key and it would convert from inch to mm. Useful if you ar converting a lot of values, say on a drawing.

Nothing similar seems to be available on the prime.