You can type in Cdim7 as in #1 or right click on a beat, click on chord, select the root, then from the drop down menu select Dim7.

Also be sure to click on options, preferences, display, and check treat dim chord as a dim triad .............

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Chord Builder 2021-06-27 14.57.27.jpg (162.55 KB, 83 downloads)
Display Options 2021-06-27 15.04.34.jpg (332.71 KB, 82 downloads)

Dad, how will I know when I've become an adult.

When your day is ruined because they rearranged the grocery store.

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware