noun, noun or participle which takes 'suru', transitive verb
Refers to pressing and holding a button or key, typically on electronic devices. Often used as a suru-verb.
電源ボタンを長押しすると、スマホが再起動します。
If you long-press the power button, the smartphone will restart.
アイコンを長押し
Long-press the icon to move the app.