use paste special but point size is still too small, ending up pasting it
as
a picture and ungrouped which made it very messy to edit. Smallest point size
used was 5.
Try to display the whole spreadsheet in Excel on your screen. Stand up and
go backward two steps. Can you read it? If not, it will be too small in
PowerPoint, too. Your screen size does not change, independent of the
program you use. And even if you use a projector to project it on a large
screen, the resolution will not change, only the pixels will be larger.
The only way is to present the essentials (or parts of the spreadsheet) on
screen and distribute the whole large table to your participants in print.
Best regards,
Ute