For the Option:  Set Measure Beat/Meter at Now dialog box (Shift-M) please add:  Tempo Curve Dialog - Create a Time Ramp or Tempo Curve in-between to Measure Beats or Markers! - Drawing tempo changes manually - deletes the Marker Point that are locked to SMPTE. - Fit to time works for events  to modify the speed of some MIDI, but not ramp a Tempo to the Markers. Feature Request: Tempo Curve  from ... to - which don't delete set Markers with locked to SMPTE