Keep in mind that during layout of the arti cle, graphs often reduced to fit them into single column. Try to make your graph reducible to this size. For example, avoid long verbal labels that extend horizontally beyond the graph. 2.1.2. Readers may need to discriminate among different indicators(e.g., multiple lines and associated plotting symbols in a line graph bars in a bar graph) Make all indicators discriminable from one another by selecting symbols or textures with distinctly different features. Code plotting symbols and lines redundant as shown in Figure 3B. Use large geometric shapes as the plotting symbols, as shown in Figure 3B. Small shapes are difficult to discriminate, especial- ly if the paper has been photocopied. When it is important to communicate infor- mation about the variability of data, scientifi graphs often display error bars. Error bars typically indicate plus and minus one stan- dard error of the mean by placing an"I" bar on each plotting symbol in a line graph or on the topmost horizontal line of a bar in a bar graph. When a line graph contains mul- tiple lines, error bars may overlap so that the