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An A6000 can have various displays, some with histogram and some without, that you cycle through by pressing the DISPLAY button repeatedly.
You can set up what display types you cycle through by hitting the MENU button, then scroll down to highlight
then hit ENTER, then you choose between 'Monitor' and 'Finder' (which is short for 'Viewfinder') - choose Monitor, hit ENTER, then you'll see a list of choices which can have checkmarks next to them. The ones with checkmarks are the ones you will cycle through by hitting the DISP button, so if you un-check the displays with histograms, here, by un-checking the ones with histograms.