Why does the computer weather icon have an exclamation point on the cloud?

Icon is short for title bar of drawing. Icons are used to indicate categories, drawing names, project names, drawing numbers, etc. So as to quickly find the required drawings from the drawing catalogue. The contents of the icon include: (1) project name. Refers to the name of the construction project (or construction unit), such as "XX Fertilizer Plant". (2) Engineering projects. Refers to the name of the unit project in this project, such as "thiamine workshop". (3) the name of the picture. Mainly show the main contents of this drawing, such as "bottom floor plan" and "standard plan". (4) Design number. Refers to the number of the project by the design department. (5) Poor figure. Indicate the professional category to which the drawing belongs, such as "Architecture" and "Construction". (6) Drawing number: refers to the number of the drawing in the professional drawing belonging to the first category, arranged in Arabic numerals.