Following points must be kept in mind while constructing a diagram or graph. Every diagram or graph must have a serial number. It is necessary to distinguish one from the other.
1. Serial number:
Every diagram or graph must have a serial number. It is necessary to distinguish one from the other.
2. Title:
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Title must be given to every diagram or graph. From the title one can know the idea contained in it. The title should be brief and self-explanatory. It is usually placed at the top.
3. Proper size and scale:
A diagram or graph should be of normal size and drawn with proper scale. The scale in a graphs specifies the size of the unit.
4. Cleanliness:
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Diagrams must be as simple as possible. Further they must be quite neat and clean. They should also be descent to look at.
5. Index:
Every diagram or graph must be accompanied by an index. This illustrates different types of lines, shades or colors used in the diagram.
6. Footnote:
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Foot notes may be given at the bottom of a diagram if necessary. It clarifies certain points in the diagram.