solver

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.

It would be helpful to have a detail showing what you want. How the foundation should look in plan and a section showing a wall and foundation. A Mono Slab does not have a footing, just a thickened edge.

This is almost always a problem with one or more walls marked No Room Definition. Notice there is no room definition in the space to the right of the hi-lighted wall. The program has a rather annoying habit of auto generating walls and marking them No Room Def. See the selected wall in the image. You also have some wall alignment issues -- the top one is obvious, the lower one the walls do not align vertically.

Close Pro, attach the plan file and I'll have a look.

Those walls are what I was referring to. You will need to make them invisible, then patch in as required. There are Shapes in the library. Find the Inverted Wedge and shape/paint it to take the place of the walls. It looks like you are using the David method where you created a blank 2nd floor. You need to create a room over the entire space so you see a floor on the 2nd floor.

Looks good.

Start a new plan. Set your defaults for ceiling heights, roof pitch etc under defaults. Draw the first floor. Build your foundation. When you build the 2nd floor, set the ceiling height to 48". Draw in walls to form the space under the dormer. Open this room and change its ceiling height to 96". Use the wall break tool to place breaks where the dormer side walls intersect the outside wall. Set this and the outside walls to Full Gable. Turn off auto rebuild roofs and raise the ceiling height in the remainder of the 2nd floor. You should be close. Depending on the interior and how accurate it needs to be, you may have some additional things to do. Now do it again using your dimensions.

Easily done even in Suite.

With Pro, you can do most anything, but not everything will be automatic.

You should see the dormer in plan, or get an error message if the program could not create it. Post some images -- use screen capture software instead of your phone please -- Windows Snipping Tool or whatever a Mac has. Attach the plan file if it's not obvious what's going on.

Setting a wall as a knee wall does not change how the roof builds. No need to rebuild the roof. Remember how ceiling heights control where your roof builds, so set it, build the roof, and when the roof looks correct, turn off auto rebuild, draw in your knee walls and add the dormers.

Nothing where? Show us a screen capture of what you see.

What do you need to dimension?

You should have scroll bars.

A picture showing what you are asking about will help others help you.