Final answer:
In the 'common send window,' it typically is wise to deselect optional features not necessary for the communication, such as 'Request a Read Receipt,' or ensuring that 'tracking changes' or personal notes are not included before sending a document.
Step-by-step explanation:
In the question, the 'common send window' likely refers to a feature within software applications used for sending documents, emails, or data. The specific context is not provided, but typically, a common send window may have options for recipients, subject lines, attachments, and perhaps security features such as encryption or 'do not copy' instructions. In general, what should be deselected may depend on the user's intent, but a common practice could be to deselect any optional features that are not necessary for the particular communication, such as 'Request a Read Receipt' or 'CC/BCC' fields if not required. Additionally, ensuring that 'tracking changes' or any personal notes are deselected before sending a document can prevent unintended information disclosure.