By accident, I turned off the scale bar in the lower right corner of CALC. How to turn it on?
Just the scale slider (which would be strange) or the whole Status Bar (View -> [x] Status Bar)?
I don’t know a way to configure the StatusBar as a whole. (Some of the fields may allow for settings.)
Beyond that you only can show the StatusBar or hide it as described in the help:
>View>Status Bar (toggling enabled/disabled).
Assuming Zoom factor slider and without toggling View/Satus Bar, I could also hide my status bar by activating View/Enter Full Screen (Mac). Also, I can drag-reduce window width until the slider pushes beyond the window border. If Full Screen button has walked off screen in full screen mode, you can drag the window header and pull the button position back into view, or enter “esc” multiple times to rise above context editing and toggle back to regular view. I did not find a way to turn off only the slider control on a visible status bar.