Cannot customize PDF reader in 7.0.21
                    After updating to 7.0.21, Zotero's native PDF reader cannot be customized. 
As I remenbered, in last version, there's an "Aa" button on the toolbar for adjusting PDF's background & foreground color, but it disappears now.
Fix this feature PLZ.
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                            As I remenbered, in last version, there's an "Aa" button on the toolbar for adjusting PDF's background & foreground color, but it disappears now.
Fix this feature PLZ.
: (
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            dstillmanNo, you are misremembering. That's a feature of the Zotero beta.
 
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