Here's some of the ones I use


Shift + H
(show/hide hidden lines)
script: /* Show hidden lines */ moi.view.showHiddenLines =! moi.view.showHiddenLines;


Shift+N
(show naked edges)
script: /* Show naked edges */ var gd = moi.geometryDatabase; gd.deselectAll(); var breps = gd.getObjects().getBreps(); for ( var i = 0; i < breps.length; ++i ) breps.item(i).getNakedEdges().setProperty( 'selected', true );


Cmd+E
(convert face to curve, need the script)
ConvertFaceToCurve


Z
(zoom on selection or zoom on everything if nothing is selected)
script:moi.ui.getActiveViewport().reset();


Space
(maximize the viewport below the mouse, or split one viewport in 4)
script:if ( moi.ui.mainWindow.viewpanel.mode != 'split' ) { moi.ui.mainWindow.viewpanel.mode = 'split' } else { var viewport = moi.ui.getViewportUnderMouse(); if ( viewport ) viewport.viewpanel.mode = viewport.name; }