The bars are colored to distinguish white keys from back keys.
Piano roll editor musescore.
It lets you add musical notes change velocity add or import lyrics etc.
Midiswing is a free portable midi editor software for windows.
The piano roll editor accessed via right click on any measure of any staff is also greatly enhanced allowing fine control of the playback of each note in your score.
You can insert and delete notes change their pitch move them between voices edit the start time length or velocity of multiple notes using a graphical interface and more.
You can also delete a midi event using midi events tab.
Ontime is specifically what sort of delay the note should have from its default on time which is zero.
Aria maestosa is a midi sequencer editor.
The piano roll editor allows you edit individual notes and tweak aspects of their playback.
The things you want to adjust are ontime and len.
Then click on the note that you want to adjust.
To open the piano roll editor pre right click on a measure in the score and choose the piano roll editor option from the context menu.
It lets you compose edit and play midi files with a few clicks in a user friendly interface offering score keyboard guitar drum and controller views.
You can edit individual tracks of the midi file using piano roll.
The layout has been adjusted to show 12 bars per octave one for each tone.
The piano roll editor will open showing the staff and measure where you clicked.