Controls on a document are disabled when you change the zoom setting of the document to anything other than 100%.

在将文档的缩放设置更改为100%之外的其他任何值时，将禁用文档中的控件。

youdao

You're also getting a 2.5-inch LCD, VGA video at 30fps, and 16MB of onboard memory, plus, the few downsides here don't sound all that bad: below average life from the included rechargeable battery, only six steps on the optical zoom, and an Exposure Compensation setting that doesn't auto-reset are the only gripes this reviewer had.

ENGADGET: Fuji's six megapixel Finepix F470 reviewed