To add terms to a localization project or to remove terms, you need to click on Terms in that project. You'll be taken to a page containing all the terms in your software localization project.
How to add terms to a localization project
You can manually add a term by clicking on the Add term button at the bottom of the page, typing it and pressing Save.
How to remove terms from a localization project
To remove one or more terms from a software localization project, check the boxes next to each string you want to delete, choose Delete Selection in the drop-down menu at the bottom of the page and press Go.
In Terms you can also see and add comments, add plural forms, see all the translations in all the languages made for a term, or add/edit reference and context.
Note: The only way to have duplicates in a POEditor software localization project is by importing identical terms with different contexts.