MS Power Point
To select all the boxes of an organization chart

Click edit, select all
Press and hold the shift key and click each box
Right click the chart background click select all
All of the listed here

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MS Power Point
To insert slide numbers

Choose Insert >> Slide Number
Insert a textbox and select Insert >> Number >> PageNumber
Insert a new text box and select Insert >> slide Number
Insert a text box and select Insert >> Page Number

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