The WebForms Start Page is editable from the Preferences menu. Click on Preferences on the right-hand navigation bar, select the desired Start Page, and click Save and Close.
Choose from Inbox, Sent, Drafts, Search, or a specific Dynamic Folder.
After saving your updated preference, each time you enter your WebForms account it will bring you to the designated page selected. Additionally, after completing a document action (saving or sending a document) you will be routed to your preferred Start page.