Tables are used to organize numeric or other data without graphic plotting or interpretation, except in the arrangement of numbers in columns and rows. Tables are best used to emphasize actual measured values or a small data set. Large or complex tables are appropriate for print media but are ineffective in slide, computer shows or video graphics. A table must be understandable and complete without detailed reference to the text.

• Line up decimal places, note units clearly, and construct clean, orderly arrangements of rows and columns.
• Highlight important numbers or words by changing the color or size.
• Round-off numbers.
• Keep row and column headings brief.
• Keep enough space between columns so they are seen as separate from one another. The space should be the minimum necessary for clear visual separation and it should be consistent.
• Vertical rules make it difficult to read across rows. Horizontal rules help with reading across the table.