Try it this way: with the Excel file open, select the cell with the data you
need (K4) and Copy it.
Now go click in the text box on the powerpoint presentation and choose
Edit -- Paste Special and select the paste as link option.

Be sure to carry a copy of that Excel file with you as you travel and make
your PPT presentation.

"GENO" wrote:

I would like to link a text box in powerpoint to a cell in excel. Can I
select the text box in excel and use =$K$4 with the data in excel to display
and change in powerpoint?