Our aircraft are ProLine 21 equipped with dual FMS-3000.
We get the 'banana' to display by selecting the below:
MFD MENU
PG 2
RNG: ALT SEL (highlight)
Also - to use VNAV to its' fullest extent during a crossing restriction, make the point in the FMS and use VNAV to hit the crossing fix.
E.G. - tonight on the way inbound to KDFW we were direct FINGR at 13,000'. ATC gave us 'cross 25 north of FINGR at 9,000 and then FINGR at 6,000.
I copied FINGR off the LEGS page and added /+25 and then inserted it above FINGR. I then added 9,000 to the LSK to the right of the new waypoint. Then I added 6,000 to FINGR, rolled my ALT down to 9,000 initially (to match the FMS ALT) and engage VNAV (btw - up came the 'banana').