By default family files are typically stored in a location like the following.
My windows and door in revit are not transparent.
As shawn mentioned the newly opened window should pop up in the foreground by default.
Open a default 3d view.
Navigate to that location and see if it contains revit family folders and files.
In autodesk revit materials such as window glass are transparent in 3d views but not in 2d views.
In the family editor in a 3d view cross a window over the family model elements.
I ve noticed though that setting this transparent for elevations by picking the opening and checking in the option for elevation makes no difference as the glass itself is not transparent in an elevation.
When trying to access revit family files you may encounter a problem locating the files.
You can first access clean boot to check the issue.
If not the revit content including doors windows project templates and so.
How do i change that.
Select the opening cut.
If the issue disappears in the clean boot environment you can continue to narrow down which entry is causing the issue.
From your revit project file select the windows family that is not appearing transparent in an elevation view and select the edit family button on the ribbon.
Its graphically confusing to see thru the windows.
Open the window family in the family editor.
It wasn t like that in revit 2020.
So a standard elevation view will look similar to this.
First verify that the display you are seeing is related to the cut plane.
Adjust the size of the section box to see if you can confirm that the difference in display is based on where the element is being cut.
By default revit uses the material property transparency in glass elements including windows only for 3d views.
There are several ways for displaying windows and other glass elements as transparent in revit elevation views.
I just switched to revit 2021 1 from revit 2020.
Isolate one of the elements in question.
Apply a section box.
In the new version when the graphic display is realistic the windows are transparent in elevation views and you can see whats behind them.
This issue can be caused by certain program installed.
This is currently a limitation of the software.
Semi transparent windows in revit elevation views.
Workaround for glass in a window family this will not generally apply to curtain wall window families.
By default it is set to not be transparent in elevation.
Select the filter button from the ribbon selection panel.