Does the section segment slope label express as a Run/Rise or Rise/Run? If it's not the way you want it, you may have to make an expression for it. Then just add the text ":1" after if in the label style.
Win 7 Pro, 32 bit; Intel Core i5 @ 2.80GHz; 4GB RAM—Civil 3D 2008 & 2011
Credit where credit is due! Give kudos or accept as solution whenever you can.
If the slopes are part of a corridor section, you can apply slope labels to links, based on their code names, in the assigned code set.
Is this a corridor or surface section? If its a corridor, look into the codeset for that link
Joseph D. Bouza, P.E. (one of 'THOSE' People) Civil 3D 2012 & 2013
HP Z210 Workstation
Intel Xeon CPU E31240 @ 3.30 Hz
12 GB Ram
Note: Its all Resistentialism, so keep calm and carry on
64 Bit Win7 OS