Text columns with images - Center single column

When using Text columns with images with only have one column, the desktop display will left align the single column. This section is designed to have more than one column. If you decide to use this section with only one column, you can use the follow CSS override code to center the column. 

Example before:

Example after:

Use the following CSS override code (this won't affect other Text column with image sections that have more than one column):

/* -- Start Pipeline override code single column centered for text column with images -- */
.homepage-columns .large--one-half:first-child:last-child {
    margin: 0 auto;
    float: none;
/* - end - */

Where do I add the code?

Use this link to learn where exactly to add this code snippet:

Where to add your CSS style code