The Play with Docker is very useful for learning Docker. This is a summary of keyboard shortcuts and detailed operations, tested in Chrome.

copy

windows

Ctrl + Insert.

mac

command + c.

paste

windows

Shift + Insert

mac

command + v.

reference

https://github.com/play-with-docker/play-with-docker/issues/65

File upload

Can be done by dragging and dropping from explorer to the console screen.
On mac, hold down the option key while dragging.

The directory structure is not reflected, so it is better to unzip the file after zipping it.

Create environment

On mac, click ADD NEW INSTANCE.

For windows, ADD NEW INSTANCE doesn't seem to work, but you can create it by clicking the wrench icon = > 1 manager 1 worker. (As of 2021-01-19)

Maximize console screen.

windows

alt + enter.

mac

option + enter (For some reason, enter is typed. Some kind of glitch?)

Change font size

windows

ctrl + "+" makes it bigger.

ctrl + "-" makes it smaller.

mac

command + "+" makes it bigger.
command + "-" makes it smaller.

ssh to access individually.

You can access it with the example commands shown on the screen, but it seems to require some kind of certificate.
Please refer to the following.

https://github.com/play-with-docker/play-with-docker/issues/285