MACROMEDIA DIRECTOR MX-USING DIRECTOR MX Use Manual page 581

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To maintain the same aspect ratio of your original Director movie no matter what size the user
makes the browser, select Preserve Proportions. The movie will fit within the width and height
parameters, as much as possible, while preserving the movie's aspect ratio. The movie aligns
within the window based on the align tags that you specify in step 4.
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To change the size of the movie to fit the size of the browser, select Stretch to Fill. Any browser
resizing stretches the movie to fill the width and height parameters. Note, however, that if the
aspect ratio of the movie changes, sprites on the Stage could appear distorted. If you select
Stretch to Fill, Director ignores the align tags that you specify in step 4.
To let users resize the Stage without resizing the sprites, select Expand Stage Size. The movie is
aligned within the browser based on the align tags that you specify in step 4.
Packaging Movies for Distribution 581