How to decorate large windows.

Do you like the openess or are you wanting to make it more like the 2 separate rooms that it is? Maybe a shelf under the window with some plants on it and maybe some hanging as well... interior shutters....Cafe style curtains.....are you more rustic,contemporary,traditional?

Would something like this work? I have also seen pictures hung in columns which would cover more area.

If you need an extra long curtain rod look at pvc pipe (sanded to a mat finish and/or stained) or electrical conduit piping (tops out at 10ft and is heavier)

Use Hodge podge and lace to cover window light can still come thru and yet you have privacy. I did my kitchen window. Love it!

Macrame curtains, stain glass (either fill or diy with paint), metal wall hangings hung in between the panes

If money is not an issue, how about installing plantation shutters which you can open and close when you want.

Thank you...it's a great idea. I do have a lot of artwork and family photos.

I photo would be helpful but here an idea for you. You don't want to completely cover that window because it's the focal view towards your inclosed family room.