视频比例
You can give users the ability to scale the video. Just select the value
Scale in the desired menu listing.
![](https://playerjs.com/project/playerjs/images/content/se19zDkRaS.jpg)
In this case, the corresponding option appears in the settings window.
A step of 5% is used by default and can be changed in the full version of the builder Elements / Settings menu / Additional settings / Scale step
In the Settings / Hotkeys you can assign scaling to the up / down arrows, as well as to the plus / minus keys. Also there is a scale command in the JS API, so you can create your own button in the player interface to control the video scale. Commands for custom buttons can look like api:scale,+0.1 to zoom in, api:scale,-0.1 to zoom out and api:scale,0 to return to normal scale.
Dragging while zooming
You can enable the Draggable option to drag the video while scaling in the PRO hotkey settings.
![](https://playerjs.com/project/playerjs/images/content/BT3DQ3Kah7.jpg)
Stretching video
To stretch the video to the full area of the player, use the Size / Background video option or the JS API stretch command. You can read more about this in the Background video article.