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Does Beep Beep Boop drive you dilly? Did you always go back to the older version until the option to do so on the page below disappeared?
I’m not sure how it works on later themes, but for my preferred old one here is a quick method for getting back to the other far more flexible version:
On the ‘My Sites’ dropdown, you don’t go to Blog Posts but to Sharing.
A new dropdown appears, and with this one the ‘Posts’ and ‘Add New’ get you into the old version, with the usual plaintive urge to use the ‘new posting experience’ – no, thank you. The old one gives far better response and ease in operation for changing fonts and colours, adding links, and manipulating elements generally.
Dead easy – when you know how. You have no idea how long it took me to find it out, though!