Remove/Add Line Breaks after Specific String using Sublime Text

Question

Using Sublime Text 2 - Is it possible to insert a line break/text return after a specific String in a text file e.g. by using the Find ‣ Replace tool?

(Bonus question: Is it possible to remove all line breaks after a specific String)

Answer 1

Here's how you'd do it on a Mac:

Command+F > type string > Control+Command+G > ESC > Right Arrow > line break

and Windows/Linux (untested):

Control+F > type string > Alt+F3 > ESC > Right Arrow > line break

The important part being Control+Command+G to select all matches.
Once you've selected the text you're looking for, you can use the provided multiple cursors to do whatever text manipulation you want.

Protip: you can manually instantiate multiple cursors by using Command+click (or Control+click) to achieve similar results.

Answer 2

Using the Find - Replace tool, this can be accomplished in two different ways:

1. Click in the Replace field and press Ctrl + Enter to insert a newline (the field should resize but it doesn't, so it is hard to see the newline inserted).

2. Inside the Find - Replace tool, activate the S&R regex mode (first icon on the left .*, keyboard shortcut is Alt + Ctrl/Cmd + R to activate/deactivate it).

3. Type \n in the Replace field wherever you want to insert a newline.

Both solutions also work if you want to find newlines, just do it in the Find field.