Select the region of the worksheet required.
Hold down SHIFT key, click menu item EDIT.
Select item Copy Picture (use As Displayed or As Printed to suit need)
Now you have a graphic of the worksheet. You can paste this on, for example,
a PowerPoint slide
To make a TIFF file you will need to paste it into a graphics program such
as PaintShopPro as do as Save As to specify Tiff
Best wishes