storefront windows
Welcome to the community!
In addition to the link on Curtain Walls that @pendean gave in his post, you may also want to consider Door/Window Assemblies.
https://help.autodesk.com/view/ARCHDESK/2025/ENU/?guid=GUID-F7B341E4-0056-4070-B290-CB541FC22C5B
These have more or less the same features as Curtain Walls, but can be hosted to a Wall, similar to a Window, which to me seems to be more in keeping with your sample file. Either will work.
Do you want your storefront to have a sill, with Wall below, as your example file has, or was that just an artifact of using Windows to show design intent?
In the attached file, I set the head to match the Head of the Doors (7'-2") and ran the storefront to the floor line. You can have the bottom above the floor line, with wall below, if that is what you want, just make the Height less that the top of frame elevation. There are three Door/Window Assembly styles. All three have 2" wide x 6" deep frames and mullions, and 1" thick panels, to represent a 1" IGU. You can control all of that. One style has manual placement of the intermediate mullions, one had a fixed number of cells, and the third has a fixed cell dimension (3'-0"), with the first and last cells set to shrink, with a minimum one-half of the fixed cell dimension. These are just examples. You can get as simple or as complicated as your design requires.
Curtain Walls and Door/Window Assemblies have greater flexibility, and, therefore, a larger learning curve, that Windows or Doors. I highly recommend reading through the Help files to get an understanding of how they work. You set up a kit of parts (Divisions, Frames, Mullions, Infills) and then apply them. You start with a primary division, but you can nest divisions within the cells of the primary division if you need that - that is how you get vertical and horizontal mullions. You can also use Doors and Windows as infill, as well as Curtain Wall Unit styles. Curtain Wall Units provide a way of breaking down a complex system into smaller, easier to understand parts and are particularly powerful if those parts are repeated.
