#20603
Yutaka Emura
Keymaster

Hello,

I am not sure why nothing happens when you press BACKSPACE on the step 4). You should see the vertical selection was converted to multiple selections, and you will see multiple rectangle frames (usually gray if you use the default theme). If you change color settings or theme, please go to configuration properties, the Display tab, and click the Reset button to reset to the default theme and see if you can reproduce the problem.
Also, please make sure you are using the latest version of EmEditor.

Thank you,