To show the list of shortcuts click on :
List of shortcuts: [ctrl] + E or S = Execute the current MQL tab [ctrl] + C = Copy [ctrl] + V = paste [ctrl] + X = cut [ctrl] + A = select all mql source code [ctrl] + Z = undo [ctrl] + Y = redo [ctrl] + F = Find window [ctrl] + M = open popup Menu [ctrl] + R = tab change on the Right [ctrl] + L = tab change on the Left