Most text boxes are editable, on occasion there are a few pieces of text that are images because they were specially designed.
If a text box is not editable you will need to delete the image and replace it with a new text box.
Watch the follow videos in order to understand how to edit text boxes:
How to edit text or font using a desktop computer:
How to edit text or font using a mobile phone or tablet device:
Mobile Phone or Tablet Editing Tips:
1) When adding words to your text boxes the text box will automatically grow to fit the size of the words you have in the box.
2) When trying to move the text box on a mobile phone you will need to carefully touch the text box and gently move it in the direction you would like.
3) In general it is easier to edit things on a computer or laptop, but a phone or tablet is great for simple edits like changing the wording only. When trying to change colors, fonts, add text boxes or images, they are more easy to edit on a computer.
More customizing tips for Corjl: