RubyMine users: you should be using bookmarks
RubyMine allows bookmarking lines of code. This is super-helpful when working on a complex problem.
I've been using this feature for a few years now, and so should you! :)
Here are the default Linux/Windows keystrokes. See the documentation for other keybindings.
Add an anonymous bookmark
F11
A gray checkmark will be shown in the gutter on the left.
If you press F11 again on a bookmarked line, the bookmark will be removed.
Add a named bookmark ("mnemonic")
Ctrl + F11
This will show a popover with digits and letters. Simply press the corresponding key to assign it to that bookmark.
The chosen mnemonic will be shown instead of the checkmark.
I recommend using mnemonics, at least with digits, instead of anonymous bookmarks. That way you can later reconstruct the way you came.
List bookmarks
Shift + F11
Shows a list if all bookmarks, and a small preview panel. You can navigate using the up/down arrow keys.
Reordering works by pressing Ctrl + up/down arrow keys; press Delete to remove a bookmark.
Go to named bookmark
Shift + F11, then the assigned key
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