Hi @dusty1014 Lowery Welcome to @BanjoBen 's Forum.
Measure 21 Eco Combo is the start of the exercise pattern which runs from 21 throu to measure 28
Measure 29 is the start of the next exercise Shifty Combo,
You will see Ben has given each exercise a name above the start of each exercise, Hope this helps
PS. If your working from the PDF Tab Files I would strongly encourage you to download the free tab player Tefview ( then download the lesson tef files) that way you can listen and see what going on in the Tab and makes it so much easier to follow the lesson…
Checkout the thread below which explains more fully the benefits of working with TEF TAB Files