Nowadays, it’s perfectly OK to use contractions in all forms of user assistance.
▪Contractions make your text more concise. ▪Contractions are more conversational than the full forms. However, don’t use contractions:
▪if you need to be formal, such as in legal texts (terms of use, end user license agreements, and so on) ▪if you want to emphasize a word, in particular the word not ▪in warnings (see Writing warnings) |