Question

The default size of stage is 550×400​

Answer 1

Answer:

Each time you open a new document, Flash uses the default document settings. Unless you've changed the default settings, new documents have dimensions set at 550 x 400 pixels

Answer 2

Answer:

Each time you open a new document, Flash uses the default document settings. Unless you've changed the default settings, new documents have dimensions set at 550 x 400 pixels.