void SCH_EDIT_FRAME::DisplayCurrentSheet()
{
    SetRepeatItem( NULL );
    ClearMsgPanel();

    SCH_SCREEN* screen = m_CurrentSheet->LastScreen();

    // Switch to current sheet,
    // and update the grid size, because it can be modified in latest screen
    SetScreen( screen );
    GetScreen()->SetGrid( m_LastGridSizeId + ID_POPUP_GRID_LEVEL_1000 );

    // update the References
    m_CurrentSheet->UpdateAllScreenReferences();
    SetSheetNumberAndCount();
    m_canvas->SetCanStartBlock( -1 );

    if( screen->m_FirstRedraw )
    {
        Zoom_Automatique( false );
        screen->m_FirstRedraw = false;
        SetCrossHairPosition( GetScrollCenterPosition() );
        m_canvas->MoveCursorToCrossHair();

        // Ensure the schematic is fully segmented on first display
        BreakSegmentsOnJunctions();
        SchematicCleanUp( true );
        screen->ClearUndoORRedoList( screen->m_UndoList, 1 );

        screen->TestDanglingEnds();
    }
    else
    {
        RedrawScreen( GetScrollCenterPosition(), true );
    }

    // Some items (wires, labels) can be highlighted. So prepare the highlight flag:
    SetCurrentSheetHighlightFlags();

    // Now refresh m_canvas. Should be not necessary, but because screen has changed
    // the previous refresh has set all new draw parameters (scroll position ..)
    // but most of time there were some inconsitencies about cursor parameters
    // ( previous position of cursor ...) and artefacts can happen
    // mainly when sheet size has changed
    // This second refresh clears artefacts because at this point,
    // all parameters are now updated
    m_canvas->Refresh();
}