User blog comment:MappingAustralia/Wordmark/@comment-35130978-20171011100202

Click a tiny double arrow button on your browser page

It should pops out a taskbar, which is useful for admins.

Once it pops out a taskbar, mouseover "My Tools" and click "Theme designer".

The page will change, you should see a big white and blue thingy on the top of your browserpage.

It should shows "Theme", "Customize" and "Wordmark" button on the top-left.

To change wordmark, obviously click "Wordmark"

There are 3 sections, which is "Community name", "Wordmark", and "Favicon"

Look at the top-middle of your browserpage, you will see a big text written "Wordmark" and "upload a graphic".

Click browse to upload your own wordmark, click ok.

and click "upload" button.

After that, you must click "Save, I'm done" button under the "Favicon" section