> For the complete documentation index, see [llms.txt](https://rmm3d.runtimecube.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://rmm3d.runtimecube.com/play/play-on-runtime.md).

# Play on runtime

* In the upper left corner of the Game window, this is the area where we can save, load, and reset the map you have created, And undo, redo your design operations.

<figure><img src="https://3624077538-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FkdTpW0j7cAXKRlaobc9y%2Fuploads%2FFUGFffkOQcHGI8HUyDoB%2FSelectMove.png?alt=media&amp;token=270220f9-0bec-45b3-8bbb-7e6f07adf1e0" alt=""><figcaption></figcaption></figure>

* In the upper right corner of the Game window, You can choose different operation handlers, which can be used to Brush/Select/Delete/Move your unitBlock.
* At the bottom of the game window is the unitBlock selection panel, which will be placed in different tabs according to different types.
* &#x20;On the left side of the game window, the vertical slider bar is used to change the map base when you operate the unitblock.