Hi John,

The manual shows the option, now if removed for ARM Debian ???

Search for 'General' in the doc, the lowest radar button available in the page, right above the 'Display FPS' slider.

The text below the Settings description shows:
"Finally another option that may help on small displays, to split the controls off into a separate window that can be hidden behind the main preview window or minimised to get it out of the way."