Field

Use title-style capitalization for field names. Don't capitalize field when it is part of a name, unless it’s in a heading or considered part of the proper name.
When referring to fields in relation to objects, use on instead of in.
If you're instructing the user to select something or enter a value, tag the value as <userinput>. Otherwise, for values such as field defaults or acceptable values, use <codeph>. Don't use quotation marks for these values.

Example

When you create a custom field on a standard object, add the custom field to your package explicitly.