· Round-off numbers.
· Keep row and column headingsbrief.
· 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. Error Bars
· Caps on error bars should match the diameter of the data point markers or symbols.
· Lines used for error bars should be thicker than lines used for the grid or frame but thinner than those used for data lines. Grid Lines and Tick Marks
· Tick marks are used to identify the type of scale, not to identify each data point. They should be long enough to be visible but not obtrusive.
· Tick marks on a linear scale should be the same length.
· Don’t label every tick mark, or the axis will look too cluttered. Number at conventional intervals, e.g., 0, 2, 4, 6, 8,etc.
· Tick marks at the beginning of each logarithmic cycle should be longer than the others.Only tick marks at the beginning of cycles in logarithmic cycles should be numbered.