Once you begin an application you will be able to save it and then resume editing at a future time. Use the 'Save Draft' button before logging out.
To resume editing you will need to find and open the application from the Current Applications area on your dashboard. It will need to have a Draft status to be able to continue editing. Once an application has been submitted you will no longer be able to change it.
Once the closing date for the grant round has passed, any applications that are still in draft (so not submitted) will automatically be moved to Incomplete and will no longer be visible.