Undo/Redo: let you undo or redo the last changes you made to the piece.
Cut, Copy, Paste, Delete, Duplicate: let you cut, copy, paste, delete and duplicate the currently selected sounds in the score.
Note that the Delete action is mapped to the Backspace key rather than the Delete key: this is because the backspace key is easier to reach, specially on a laptop keyboard.
hint: HighC implements smart paste and duplicate operations: each time you perform a Paste or Duplicate operations, then move the selected objects at a desired location, the next Paste or Duplication operation will apply the same relative changes you have performed. This lets you create repetitive patterns easily: first create a simple pattern, select it, copy/paste it, then move the selected objects (as a group) at the desired location. The next time you paste objects, those will be pasted at the same relative location. Repeatedly calling paste for as many bars as you want let you create a constant line easily.
Set Waveform: lets you assign the currently selected waveform (in the Waveform editor) to all the selected sounds. The waveform of a sound is represented by a randomly assigned color, which is visible in the waveform editor.
Set Envelope: lets you assign the currently selected envelope (in the Envelope editor) to all the selected sounds. The envelope of a sound is represented by the width of the sound, which has the same profile as its envelope.
Set Level...: Lets you set the level to all the selected objects, or increase or decrease this level by a relative amount. The level is a number between 1 (pppp) and 9 (ffff) that specifies the relative loudness of the sound with respect to the other sounds in the piece. To increase the level, make the number start with a "+" sign, to decrease it, make it start by a "-", to set it to a fixed value for all sounds, simply enter the desired level with no + or - preceeding signs. You may specify even higher or lower values to increase the dynamic range of your piece. The relative loudness of the sounds is represented visually by the transparency: loud sounds are opaque, while feeble sounds are almost fully transparent.
Select from Waveform: selects all the sounds that use the currently selected waveform.
Select from Envelope: selects all the sounds that use the currently selected envelope.
Select from Pattern: selects all the sounds that use the currently selected pattern.
Select All: selects all the visible sounds in the piece.