How do I create sections that show multiple surfaces?
All surfaces are existing, none are design. (existing ground, grubbed surface, bedrock surface)
How I miss LDD.
Create a surface style that is "Show only in Section". Create your below EG surfaces and set their style as "Show only in Section". Now the surfaces will show up in your sections. Once a surface is created, the way that surface is displayed is only limited by your creativity in creating the styles.
The surfaces need to be referenced to your sample line group, either from your corridor or from a data reference. And yes, they style needs to be set to show them in section. Your sample line group can't show them if it doesn't know it's there. If they're referenced in your drawing, check your sample line group properties, you may need to add them as sources.
BTW - I don't miss LDD at all, I'd never go back.