Thanks for the feedback. 1. The icon buttons are labeled by its `title` attribute, may be not conspicuous. 2. Tap the `Enter` key on the keyboard can also con

Thanks for the feedback. 1. The icon buttons are labeled by its `title` attribute, may be not conspicuous. 2. Tap the `Enter` key on the keyboard can also confrim the cropping (Confirm by dblclick is also supported now). I will continue to improve the app. Thanks again.