Create a tumbler with a heart engraved that contains the words "Gos is love" to give it a personal, distinctive look
Create the heart and add the words as you feel convenient. Use the XCS tools to do so.
Position the tumbler and set the area to work with so the engraving fits where you want it or need it.
You need to specify what kind of material will you be using and the engraving settings in order to get the final effect that you aim for.
Do a marking before you engrave so your design fits where you want it and in the area preferred by you.
Once everything is according to your like, then proceed to engrave. After this step, make sure to clean the engraved area so you get the desires effect.