I know virtual radar (VR) can be disabled in options-navigation-instruments. But, to facilitate the task in flight it would be very appreciated to have a shortcut to show/hidden VR, in a similar way to the direction indicator. In some flight areas with few heights variations VR is not so important. Also, navigation map will have more space in small devices.

We have no plans to facilitate easy hiding of the virtual radar. If you think it isn't particularly useful to you, you are probably not using it fully. It's an integral and essential part of safe navigation with SkyDemon.