Highlight regions

Use this to quickly get an overview over the currently active regions.

Arguments

`monitor` — Monitor

Defaults to all monitors. You can find monitors by specifying their number, their monitor handle (HMONITOR, as hexadecimal, formatted as 0xdeadbeef), or by their exact device name ("\\.\DISPLAY1"), serial number or friendly name.

`timeout` — Timeout in milliseconds

Number of milliseconds to wait before hiding the highlight.