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 
AI-generated summary
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.
「いいね！」 1
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 
「いいね！」 1
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…
「いいね！」 1
@codinghorror、この件を Contribute > Feature に移動されたことに気づきました。iPad でのコンポーザーのサイズ変更機能は機能リクエストであることに同意しますが、単に動作しないグレイバーを表示することは Contribute > Bug ではないでしょうか？グレイバーのタッチ対応修正が難しい場合でも、マウスがないデバイスでは少なくともそれを非表示にすることはできませんか？
Good luck detecting that in the browser, but if you can.. go ahead and PR it.
