The other three actions here refer to the virtual keyboard. If you require text or numeric input in your game on a touchscreen device, then you can use the virtual keyboard actions provided to use the device OS keyboard. These actions will call up or hide the OS keyboard and accept input from it just the same as a physical keyboard, so the regular GameMaker Studio 2 keyboard actions should all work with virtual keyboards (for example, the "If Key Released" action), and any input from the virtual keyboard will be stored in the different keyboard variables, like keyboard_string, or keyboard_last_char, etc...).
Opening or closing the virtual keyboard will generate System Asynchronous Events, in which the async_load DS map will be populated with the following key/value pairs:
The available virtual keyboard actions are: