How to create t-shirt designs with transparent backgrounds using LibreOffice Draw and GIMP

Last night I volunteered to create a t-shirt design for the addiction recovery Bible study that my husband and his best friend are teaching. We're planning to wear them for the Recovery Walk in Philadelphia next week and we want everyone on the team to match.

I needed to create a design with one image and text with a transparent background and I know I'm supposed to be able to do it with GIMP. But I just can't figure out how to format text in GIMP, and haven't found a good tutorial on it yet.

But I do know how to use LibreOffice Draw! I created a design in LibreOffice Draw with the hope that I could copy and paste it into GIMP. It worked! Here's how to do it:

1. Create a new document with a transparent background in GIMP.
2. Switch to LibreOffice Draw and create a text design. Select the elements of the design and copy them to your clipboard.
3. Switch back to GIMP and paste.
4. Export the design to your desired format.

Voila! You now have a text design with a transparent background that can be uploaded to a t-shirt printer.

Maybe I can offer this as a service in the near future, hmmm.

Update: I just found out that when exporting designs from LibreOffice Draw into an image format, it will automatically have a transparent background! Now I just need to figure out how to specify size in pixels.