This lesson continues to explain the use of tools within our programming environment. I will describe how to check for unused tags in both TIA Portal and Step 7. Although the location where you find the tool varies in the two software packages, the search result is the same. That result will show you where you may have some tags that you had originally intended to use in the program but have deleted the logic or just tags that you thought you may used but picked another programming option instead. Open up this lesson and let’s find some unused tags.