KI Holders are Furniture Objects (FOs) that can be used to host KIs. These include obvious objects like frames and signs, as well as create objects such as pillows, t-shirts, and other objects.
To know which FOs host KIs, look for any object that has an empty gray canvas with a darker circular icon in the middle of it.
Once you have the FO that you like, drag it into the Sagan and place it where you would like to see it appear.
From there, drag your KI from either your palette or your computer's file browser, similar to how you add items to a bookshelf.
If you would like the change the orientation of your KI Holder, use the FO edit menu at the bottom of the screen (once you select the FO) to spin it 90 degrees.
The KI moves with the KI Holder, which changes its orientation as well. 
opens the FO Settings palette on the right side of the screen.
This menu creates multiple options for changing the KI within the KI Holder. If you select Rotate Canvas, for example, you can get your KI to face the proper way within the KI Holder.
Zoom shifts the KI's size within the KI Holder.
Shift Horizontal and Vertical moves the KI around the KI Holder.
Toggle Backlit changes the KI so it no longer respects the lighting of the Sagan and displays at full brightness.
And Clear Knowledge deletes the KI from the KI Holder.
Some KI Holders host multiple KIs. In that case, you can select the various open canvases in the menu on the far right and change each one individually.
