In the BB Opts.-Prefs-Notation options there is a tip when hovering over the Fine Resolution check box (see below).
For me this option to set the resolution is only available in Editable Notation mode in BB, YMMV
/I'm much more comfortable in RB but that should help with BB .. you BB gurus should know this!
//Since BB only allows 120 resolution for MIDI, your actual results may vary, depending on tempo (it's math)
///best I could do on short notice
