sublimetext3

First, select multiple lines (by dragging mouse, shift+arrow, etc.). Then, press: CTRL+SHIFT+L or on MAC: CMD+SHIFT+L (as per comments) Alternatively you can select lines and go to SELECTION MENU >> SPLIT INTO LINES. Now you can edit multiple lines, move cursors etc. for all selected lines.

EDIT With the release of Sublime Text 4, there is now a feature called Split View that you can access a couple different ways. Via the menu system, you can simply use File -> Split View. You can also right-click on a tab and select Split View from the context menu. It automatically opens a … Read more