How are corrections or revisions indicated on a drawing?

Corrections or revisions on a drawing are typically indicated using numbers or letters that have a circle or triangle drawn around them. This method provides a clear way to highlight the specific changes that have been made to the original drawing, ensuring that anyone reviewing the document can easily identify what alterations have been implemented.

This approach has several advantages, including clarity and quick reference. When modifications are denoted with circled or triangular annotations, it allows for straightforward tracking of revisions, especially in complex drawings with multiple updates. As a result, this practice enhances the effectiveness of communication among those involved in the project, facilitating better understanding and collaboration.

In contrast, while using a different color may help differentiate changes visually, it doesn't always convey the specific nature of the revision clearly. Similarly, using arrows may point towards changes but can lack explicit context regarding what those changes are. Striking through the original text may indicate a change but can lead to confusion if not adequately accompanied by a clear indication of what the replacement is, making it less effective compared to the circled or triangular method.