When the editor is open in desktop view, it shows a little grabber in the top center to allow resizing.
This grabber refuses to cooperate with my finger – I cannot resize the editor with touch on my laptop (Chrome on Windows), mouse or pen input work fine.
On iPad, the editor cannot be resized at all, because there is only touch 
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Cannot resize the editor with touch: fefrei reports an issue where the editor cannot be resized with touch input on a laptop (Chrome on Windows) and not at all on an iPad. codinghorror suggests using a mouse, but acknowledges the limitation for devices with only touch input. fefrei explains the need for resizing, citing the inconvenience of proofreading long posts on an iPad. fefrei argues that the non-functional grabber is a bug, and proposes hiding it on devices without a mouse. codinghorror invites a pull request to implement this fix, if possible.
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This is another no mans land between the rare devices that have mouse and touch simultaneously. For now, use mouse.
My iPad has no mouse, so I cannot resize the editor at all 
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Why would you need to? I can’t recall ever needing to, in years of using iPads with Discourse.
In that case, I was proofreading a long post I had written.
It feels really silly to have an iPad-sized device when the post you are reading is forced into an iPhone-5-sized box on the bottom…
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@codinghorror，我注意到你将其移到了 #contribute:feature。我同意在 iPad 上调整编辑器大小属于功能请求，但显示一个根本无法工作的拖拽手柄，难道不应该归类为 Contribute > Bug 吗？如果修复拖拽手柄以支持触控操作很困难，我们至少能否在没有鼠标的设备上将其隐藏？
Good luck detecting that in the browser, but if you can.. go ahead and PR it.
