User Manual

The initial resolution of the Fusion comp is the size of the source media. Depending on how you
combine images and the nodes you use, the output comp resolution can be maintained
or modified.
TIP: The output of the Fusion page is placed back into the Edit page Timeline based
on DaVinci Resolve’s Image Sizing setting. By default, DaVinci Resolve uses an image
sizing setting called Scale to Fit. This means that even if the Fusion page outputs a
4Kcomposition, it conforms to 1920 x 1080 if that is what the project or a particular
Timeline is set to. Changing the image sizing setting in DaVinci Resolve’s Project
Settings affects how Fusion compositions are integrated into the Edit page Timeline.
Changing the Resolution of a Clip
If your comp uses a single image, you can change the pixel output resolution in several ways.
Three common tools that change the pixel resolution of a clip are the Resize, Scale, and Crop
nodes. A fourth node, Letterbox, is less commonly used but also changes the pixel resolution
of a clip.
These four nodes are located in the Transform category of the Effects library. Resize is also
located in the toolbar.
 Crop: Sets the output resolution of the node using a combination of X and Y size along
with X and Y offset to cut the frame down to the size you want. Crop removes pixels
from the image, so if you later use a Transform node and try to move the image, those
pixels are not available.
 Letterbox: Sets the output resolution of the node by adding horizontal or vertical black
edges where necessary to format the frame size and aspect ratio.
 Resize: Sets the output resolution of the node using absolute pixels.
 Scale: Sets the output resolution of the node using a relative percentage of the current
input image size.
TIP: To change resolution and reposition a frame without changing the pixel resolution
of a clip, use the Transform node.
Compositing with Different-Resolution Clips
When you composite images with different resolutions using the Merge node, the image that’s
connected to the orange background input determines the output resolution of the
Merge node.
Often, it’s easiest to control the comp resolution right at the start by connecting a node with the
desired output resolution you want to the orange background input on the Merge node. A
Background node is often used in this situation because it consumes meager system resources.
1360Chapter – 67 Controlling Image Processing and Resolution