Should English warnings be capitalized?

Yes Design warning signs in English according to the length of warning sentences. All the letters of short warning sentences are capitalized and bold. Important warning words such as warning in longer warning sentences are capitalized, and the first letters of other sentences are capitalized. According to the habit of English symbols, they are all capitalized without a period; Use noun phrases and gerund phrases; Sometimes imperative sentences are used; Sometimes a very formal style is used.