ctrl-d is set to some action which is not in keymappings

[teropentis64]

What is the feature you'd like to have? be able to bind ctrl-d

Is your feature request related to a problem? yes, ctrl-d is set to some action related to selection, it seems like it sets token highlight to nearest brace. the key ctrl-d is not visible in key mappings

Are any alternative solutions acceptable? i can just bind it to other key but i have 'D' for display as decimal, and wanted 'ctrl-d' for unsigned decimal. i can set it to ctrl-d but it works the 2nd time i click it, first time i click it moves selection to nearest brace

Im on macOS.