Microsoft® Manual of Style, Fourth Edition

Slash mark

Do not use constructions that contain a slash mark to indicate a choice, such as either/or and he/she. However, and/or is all right to use if you have no other choice. Localizers and non-native English speakers may not know whether the slash mark indicates a choice, indicates that the two words are synonyms, or indicates that the two words are part of a single construction, such as client/server.

Do not use a slash mark as a substitute for or. If the user interface uses a slash in this way, follow the interface in describing the label, but use or in describing the corresponding action.

Microsoft style

Click Automatic trapping to add or remove a check mark.

Not Microsoft style

Click Automatic trapping to add/remove a check mark.

Use a slash ...