On the Planetary Information page,
If the time hasn't been adjusted with the <(NOW)> buttons,
For each planet listed,
If the planet is CURRENTLY risen (past rise, before set),
Draw an icon or letter in a margin to indicate it's risen.
Example:
5:00pm
(*) Mars: 4:56am 7:19pm
Jupiter: 12:23am 3:03pm
Bonus:
Draw different icons, one for "recently risen," one for "about to set," and one for the rest of the risen period.
This has been coded and checked and will be in the next official release.