Rubymine supports keybinding to switch panes by hotkey like awesome window manager users are used to.

Rails Long Term Support

Rails LTS provides security patches for old versions of Ruby on Rails (2.3, 3.2, 4.2 and 5.2)

• Prevents you from data breaches and liability risks
• Upgrade at your own pace
• Works with modern Rubies

Read more Show archive.org snapshot

Type "splitter" in the top right keymap section search field (not the global settings search).

Note: A splitter is what you get after using split vertically or split horizontally.