many standard mailbox frames were available offering various designs for greetings cards or seasonal messages such as valentine cards. messages could only occupy a single frame, so the main message text field could typically take up to a maximum of 100 words, depending upon how many other fields were required and what graphics were used on the frame. mailbox frames were completed by entering relevant details and pressing the # key on each field. completing the last, or only, of which lead to the request to "key 1 to send key 2 not to send". assuming all went well, this led to a subsequent final screen confirming successful dispatch, or if there were problems (such as a mistake in entering the mailbox number) then an appropriate error frame was displayed. if it was desired to send the message to more than one recipient then it was necessary to re-key the message text into a fresh message frame, although some popular micro-computers of the time provided the facility to store the message so that it could be copied and pasted into a new message.