Is the bottom line on the LCD grid used?

Looking carefully at the MC6 display, each character location is a 5x8 grid, but all the characters fit in a 5x7 grid. I have yet to see a character use the bottom line of the grid (including chars with descenders like “g”).

Would be great if this was a way to underline a pressed button … or make the font size 12.5% bigger?

The chip that is used with these LCDs exposes a set of instructions to display stuff on the LCD. Related to what it can print, it is mostly ASCII characters. if you want to print some characters and then underline all the characters then that is not possible.

The bottom row is actually used for a cursor. If you edit the name directly on the device, we use the cursor to show the character you are currently editing.