Small Font When Viewing Return
If you experience small or unclear fonts when viewing a return and changing settings by going to Setup > Options has no effect, then you may need make an adjustment in View mode.
In View Mode, open a document and right-click inside of the document, then select Zoom Percentage. Confirm that the size of the document has not been set to less than 100%. If it has, try selecting 100% or 125% from the drop menu to see if this clears the problem.