Hi there,

You don't need to create cutouts to visualize the ceilings => in order to visualize the ceilings developed with the Ceiling Designer, you can choose if you wish to show or not the ceilings and / or floors. For example, in the image below, you can see two rooms. If you click inside the room, it will become yellow and the Properties Bar will be activated.
If you uncheck the option "Show Ceiling" (pointed with a red arrow in the image) the ceiling becomes invisible (just in the room selected)

Show Ceiling2.jpg (81kb) downloaded 7 time(s).

Not sure what do you mean by "there is no borders that connect it to the original ceiling height.".

Coffered ceilings are templates so you can edit them.

Punch, as any program, has a learning curve. The best way to learn the program, IMO, is practice + practice + practice => Read and follow the manual (this is important), see the videos => try to create elements not related with your project, so you will become familiar with the commands and how to develop the different components. In the manual, you will find information about the Ceiling Designer Power Tool, staring in the page 323.
You will find free tutorials in my Website and Facebook page
If you are interested, this is the link for the V20 eBook for Windows. My eBook includes a chapter with tutorials about the Ceiling Designer Power Tool. If you have another version, see a link to my eBooks page below, in my signature.

Hope this helps.