potatomatoes167 
You Can Execute Terminal Commands in Vim I’m currently working through Vim lessons, from the beginning up to lesson 5.1. I discovered that you can execute terminal commands directly within Vim—for example, using :!ls to list files.
Practice Vim Today I practiced Vim using vimtutor, covering lessons from the beginning through Lesson 3.2. I reviewed basic movement keys, editing commands, and started understanding how operators and text objects work. It’s starting to feel more intuitive!
Vimにおける「U」アンドゥコマンドの挙動について カーソルを別の行に移動すると「U」の挙動が変わる Vimtutorのアンドゥに関するレッスンで練習していたとき、「U」を押しても何も起こらないことがあり、困惑しました。調べてみると、「U」コマンドは、カーソルがその行に移動してから行った変更のみを元に戻すことがわかりました。 つまり、誤って「j」や「k」を押して別の行に移動し、すぐに戻ってきた場合でも、「U」は期待通りに動作しません。カーソルが一度でもその行を離れると、変更履歴がリセットされてしまうのです。 慎重なタイピングを心がけることで、「U」が意図通りに動作するようになります。Vimの操作に慣れていくことで、こうした問題に遭遇することも少なくなるでしょう。
Understanding the “U” Undo Command in Vim Moving the Cursor to Another Line Breaks “U”‘s Behavior While practicing in Vimtutor‘s Undo lesson, I ran into a confusing issue: sometimes pressing “U” didn’t do anything. After some research, I learned that the “U” command only undoes changes made on the current line since the cursor moved to it. This means if you accidentally press “j” or “k” and move to another line—even briefly—then return, “U” won’t work as expected. It forgets the changes because the cursor left the line. Careful typing helps ensure “U” behaves as intended. As I continue learning Vim controls, I expect to encounter these problems less often.
You Can Access Major Symbols by Long-Pressing “.” in Gboard I used to worry about how to input symbols like “?” and “”” on my Android smartphone. After doing some research, I found that in Gboard, you can access many major symbols by long-pressing the period key (“.”). For example, long-pressing “.” gives you options like “?” and “””. Now, I feel much more comfortable typing in English!