An entire row or column. Click the row or column heading. Row heading. Column heading. You can also select cells in a row or column by selecting the first cell and then pressing CTRL+SHIFT+ARROW key (RIGHT ARROW or LEFT ARROW for rows, UP ARROW or DOWN ARROW for columns).
If you like this, you might also like hihat. It is very similar, but more focused on running and testing browser applications. Hihat uses browserify to bundle everything into a single source file, and uses watchify for incremental file changes. In some ways, devtool is a spiritual successor to hihat.
1 Read the 2016 State of DevOps Report to learn how DevOps helps teams improve both IT performance and business results.  Puppet is a strong foundation for DevOps practices. You can try out Puppet with our free Learning VM, which takes you on a fun series of quests so you can learn Puppet step by step.