6. Expand the Resources option (Figure 42). Figure 42 7. View the Font number in parentheses If the number is in the 100s, this is very likely the cause of any slow page rendering and should be fix immediately. Proceed to step 8. OR If the number is within a normal range – 5 to 10 fonts – be sure to spot check a few more of the PDF’s pages to see if their Font number is also within normal range.