The usual method for changing annotations (clicking right or left to select the
annotation to be changed, then clicking the middle button to perform the
change) can become tedious if you have many annotations to change. WAVE
offers a shortcut
if you wish to change all annotations in a specified region
in the same way. First, specify the region by inserting a `<' marker
before the first annotation to be changed, and a `>' marker after the
last annotation to be changed. Next, fill in the Annotation Template to
indicate how you wish to change the annotations in the region. Finally, click
left on 
. (If the region includes any
annotations that are not visible on-screen, WAVE prompts you to confirm
that you wish to change them.) Try out this technique now. Insert the `
<' marker at 0:15, the `>' marker at 0:30, and change all of the
annotations in the region to type `V' (premature ventricular
contraction). Inspect the results, then change them back to `N'
annotations.