12d Model

hey there i was wondering if we can assign the building floor levels using 12 D and create any strings on it if some one can please tell me if it is similar to creating pads o 12D?

When i am trying to plot the long section of my road design, from the option:

View, plot long section, the plotppf file that i am reading in each shown invalid string name when i am trying to select plot.

If some one can please assist me on this issue will be really thankful to.

Cheers

Thank you, but after that what selection am i meant to be making because there is nothing that is appearing once i select

Can some one please tell me, if 12 D generate a line of best fit and curve of best through a number of points on an existing road ?

I am pretty new to 12 D, can some one please tell me how would i obtain the existing radius for the existing road on 12 D?

Thank you in advance !