I might just be having a brain fart, but I'm redrawing blueprints for a customer based on ones they had from construction in 1967. I'm trying to keep it as close to the originally drawn as possible (layout, detailing notes, everything, just migrating to CAD). The detailer did a fairly nice job and I've been trucking along but he has two section views that are giving me issues as they don't penetrate the entire body, but not in the same direction as a section depth would be.

For instance, section D he has cutting through the front and looking up, fairly straight forward, but for the section D-D view, he only shows the front half of the part since it's symmetrical front to back. Setting section depth just adjusts how far up and down the view goes, not how far front to back, and half section just gives me the half left to right not front to back. Resizing the section line gives me a half view left to right as well which is not what I'm desiring.
 

I feel like I'm missing something super common that I've done in the past but I also don't use SW daily, just a handful of times a year. Any advice is appreciated.

These are the original parts of the drawing where he has Section D looking down from the top, and Section C looking down from halfway down the part.

This is his resulting views that I'm trying to replicate: