Make the Text Editor Larger in Email Templates

The feature is available starting version 2012.2.

This is working on Firefox, Chrome and Edge browsers.

When working with images, the box for the Text editor is not maximized and is too small. This forces the user to scroll from left to right to view the page.

To adjust the template text editor window. Click on HTML Source Code and pull the box to the right to make it larger and have the content fit the screen to minimize scrolling to left and right.