Drafted but unsent Proposals can be revised and found in Create/Edit > Proposals > Select Proposals drop-down list (unless the Expiration Date or Event Date has passed). Likewise, drafted but unsent Cards can be revised and found in Create/Edit > Card > Select Card drop-down list (unless the Expiration Date or Event Date has passed).

Click on either drop-down list to see your saved Proposal or Card drafts. When you select one, all of its information will appear for you to resume editing.