Classroom in a book

5
Try a few other blend modes to observe their effect.
6
Delete the gradient circle clip from the Video 2 track, and drag the blend title 
to where it was. Stretch the title to the same length as the video clip in the 
Video 1 track.
7
Change the blend mode on the Blend title menu to Color Dodge, and then play 
the clip. Notice how the color of the video clip now interacts with the colors in 
the title.
Working with alpha-channel transparencies
Many graphics, some of the Adobe Premiere Pro transitions, and some video clips 
have what are called 
alpha channels
—portions of the clips or gaps in the transitions 
that can be made transparent, revealing what’s below those clips and transitions on 
a sequence. You’ll work with both in this exercise:
1
Delete the gradient circle clip from Video 2 track, and drag the logo.psd image 
where it was. Stretch the clip to the same length as the video clip in the Video 1 
track.
2
Click the logo.psd clip, open the Effect Controls panel, and adjust the position 
parameters to 1075 and 550. This moves the logo to the lower-right corner 
where logos (or bugs) are commonly displayed.

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ptg
ADOBE PREMIERE PRO CS5 CLASSROOM IN A BOOK
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This is a Photoshop graphic with an alpha channel. By default, Adobe Premiere 
Pro makes the graphic opaque and its alpha channel transparent, allowing 
whatever is below the alpha channel on the sequence to show through. You can 
use the Alpha Adjust effect to see the alpha channel.
3
Choose Video Effects > Keying > Alpha Adjust to apply Alpha Adjust to Logo.psd.
Alpha Adjust is the clip-based version of the Opacity fixed effect. As with the 
Transform effect’s connection to Motion, you can use Alpha Adjust to apply 
Opacity at some other point in the effect chain, instead of second-to-last, where 
it would occur if you were to use the Opacity fixed effect. Alpha Adjust has a 
few extra parameters in addition to Opacity.