Once you’ve opened the web app in your browser, the web app will new a default blank project. But you also can creating new documents by click the logo button and selecting NEW from the menu.
ps: If you want to save your work into your Google Drive or Dropbox, you need login first by click USER/Sign in button at the right of the top function area.
The NEW FILE dialog: You can choose a environment template to create your project or just set the Width and Height to create a blank project.
Open an existing file (YouiDraw Logo Creator files only): You can choose a file from your local drive, or Google Drive and Dropbox when you login by these service account.