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

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

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MS Power Point
To insert slide numbers

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

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