Yes, this is possible if you are using the Markdown editor in Notezilla .
Any where you can type the following to insert a checklist:
- [ ] First line.
- [ ] Second line.
Also, you will find the "Convert to Checklist" option if you are using the Standard editor. This will convert the whole sticky note to a checklist sticky note.
Watch this short video to learn more about this feature:
Creating a checklist inside a sticky note using the Markdown editor in Notezilla
Creating a checklist inside a sticky note using the Standard editor in Notezilla