solver

You can often draw CAD lines and dimension to them. Make parallel/perpendicular is your friend.

No. You need to use one of the Cross Section cameras.

Contact Chief Architect directly.

No

Isn't the answer obvious

Yes, you missed a step. -- right at the end. The article would say if there are automated ways of doing this. There is no way to set the default thickness of a truss. Like the article shows, you create a single truss, make your changes, then copy it to other locations. Trusses build between the roof and ceiling. Adjust those 2 things, build your truss, then change them to show the truss as you like. Read about the settings in the truss specification dialog like Force Rebuild

Have you reviewed the documentation on trusses available on the Home Designer web site, watched videos, searched the forum?

Quick howto on doing this with manual roof planes. Watch on YouTube: http://youtu.be/TaWh1MhYcUY?hd=1

There are several ways to do this. Draw a Room Divider across as I've shown here and set it to be a Full Gable wall.

Did you If that does not work, reinstall and use the Repair option.

A screen capture would be helpful. Try Preferences, Reset Options

You have both Patterns and Textures to change. Make sure you change both, then post back if you still have a problem.

Post the plan.

Select the stair, look in the Edit Toolbar.

What's stopping you, or, what's happening that you don't want?

It's not clear what you want to do. only over one of the rooms? You can create a 2nd floor any shape you want.

Then you clearly have a different problem. When something does not display as you expect, start by checking your Display Settings. If Ceiling Surfaces is not checked, they will not display. Remember Display Settings are unique for each view. Plan view and a camera view each have a different set of settings. Next make sure the objects settings are correct -- like the 0" problem shown above, or a wrong material.

Yes it will. If that's all he wants, why not create a PDF and send it to him?

There are no Home Designer specific viewers, but ones for Chief should work. https://www.chiefarchitect.com/products/3d-viewer/ There is a Desktop Viewer download on that page too.

Watch on YouTube: http://youtu.be/B8wENHhd4lE?hd=1

Are you making a copy before reflecting? They are not disappearing, they are being moved.

How are you mirroring? The simple way is using Edit Area. Use Edit Area to select the left side, copy / reflect about object (party wall or cad line etc).

Draw you own wall. Read about Roof Cuts Wall At Bottom and Lower Wall Type When Split by Butting Roof.

Like everything displayed, look to your Layer settings for font, text size etc. With Home Designer, you cannot create layers, so changes are global -- everything on the layer will reflect your change.

Home Designer doesn't have polyline labels. Could you be more specific -- post an image etc.